guix/gnu/packages/audio.scm

;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2015, 2016, 2017, 2018, 2019, 2020 Ricardo Wurmus <rekado@elephly.net>
;;; Copyright © 2015 Taylan Ulrich Bayırlı/Kammer <taylanbayirli@gmail.com>
;;; Copyright © 2015 Andreas Enge <andreas@enge.fr>
;;; Copyright © 2015 Alex Kost <alezost@gmail.com>
;;; Copyright © 2015, 2016 Mark H Weaver <mhw@netris.org>
;;; Copyright © 2016, 2017, 2018, 2019 Efraim Flashner <efraim@flashner.co.il>
;;; Copyright © 2016, 2017 Alex Griffin <a@ajgrf.com>
;;; Copyright © 2016 Nikita <nikita@n0.is>
;;; Copyright © 2016 Lukas Gradl <lgradl@openmailbox.org>
;;; Copyright © 2016, 2017, 2018, 2019, 2020 Tobias Geerinckx-Rice <me@tobias.gr>
;;; Copyright © 2018, 2020 Oleg Pykhalov <go.wigust@gmail.com>
;;; Copyright © 2018 okapi <okapi@firemail.cc>
;;; Copyright © 2018, 2020 Maxim Cournoyer <maxim.cournoyer@gmail.com>
;;; Copyright © 2018 Clément Lassieur <clement@lassieur.org>
;;; Copyright © 2018 Brett Gilio <brettg@gnu.org>
;;; Copyright © 2018, 2019 Marius Bakke <mbakke@fastmail.com>
;;; Copyright © 2018 Thorsten Wilms <t_w_@freenet.de>
;;; Copyright © 2018 Eric Bavier <bavier@member.fsf.org>
;;; Copyright © 2018 Brendan Tildesley <mail@brendan.scot>
;;; Copyright © 2019 Pierre Langlois <pierre.langlois@gmx.com>
;;; Copyright © 2019 Leo Famulari <leo@famulari.name>
;;; Copyright © 2019 Rutger Helling <rhelling@mykolab.com>
;;; Copyright © 2019 Arun Isaac <arunisaac@systemreboot.net>
;;; Copyright © 2019 Mathieu Othacehe <m.othacehe@gmail.com>
;;; Copyright © 2019, 2020 Alexandros Theodotou <alex@zrythm.org>
;;; Copyright © 2019 Christopher Lemmer Webber <cwebber@dustycloud.org>
;;; Copyright © 2019 Jan Wielkiewicz <tona_kosmicznego_smiecia@interia.pl>
;;; Copyright © 2019 Hartmt Goebel <h.goebel@crazy-compilers.com>
;;; Copyright © 2019 Nicolas Goaziou <mail@nicolasgoaziou.fr>
;;; Copyright © 2020 Vincent Legoll <vincent.legoll@gmail.com>
;;; Copyright © 2020 Guillaume Le Vaillant <glv@posteo.net>
;;; Copyright © 2020 Jonathan Frederickson <jonathan@terracrypt.net>
;;; Copyright © 2020 Giacomo Leidi <goodoldpaul@autistici.org>
;;;
;;; This file is part of GNU Guix.
;;;
;;; GNU Guix is free software; you can redistribute it and/or modify it
;;; under the terms of the GNU General Public License as published by
;;; the Free Software Foundation; either version 3 of the License, or (at
;;; your option) any later version.
;;;
;;; GNU Guix is distributed in the hope that it will be useful, but
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;;; GNU General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.

(define-module (gnu packages audio)
  #:use-module (gnu packages)
  #:use-module (gnu packages algebra)
  #:use-module (gnu packages autotools)
  #:use-module (gnu packages avahi)
  #:use-module (gnu packages backup)
  #:use-module (gnu packages base)
  #:use-module (gnu packages bison)
  #:use-module (gnu packages boost)
  #:use-module (gnu packages check)
  #:use-module (gnu packages compression)
  #:use-module (gnu packages curl)
  #:use-module (gnu packages dbm)
  #:use-module (gnu packages documentation)
  #:use-module (gnu packages elf)
  #:use-module (gnu packages emacs)
  #:use-module (gnu packages file)
  #:use-module (gnu packages flex)
  #:use-module (gnu packages fltk)
  #:use-module (gnu packages fontutils)
  #:use-module (gnu packages gcc)
  #:use-module (gnu packages gettext)
  #:use-module (gnu packages gl)
  #:use-module (gnu packages glib)
  #:use-module (gnu packages gnome)
  #:use-module (gnu packages gnunet) ; libmicrohttpd
  #:use-module (gnu packages gperf)
  #:use-module (gnu packages gtk)
  #:use-module (gnu packages guile)
  #:use-module (gnu packages icu4c)
  #:use-module (gnu packages image)
  #:use-module (gnu packages libbsd)
  #:use-module (gnu packages libusb)
  #:use-module (gnu packages linux)
  #:use-module (gnu packages llvm)
  #:use-module (gnu packages man)
  #:use-module (gnu packages maths)
  #:use-module (gnu packages mp3) ;taglib
  #:use-module (gnu packages multiprecision)
  #:use-module (gnu packages music)
  #:use-module (gnu packages ncurses)
  #:use-module (gnu packages networking)
  #:use-module (gnu packages onc-rpc)
  #:use-module (gnu packages perl)
  #:use-module (gnu packages pkg-config)
  #:use-module (gnu packages pulseaudio)  ;libsndfile, libsamplerate
  #:use-module (gnu packages python)
  #:use-module (gnu packages python-xyz)
  #:use-module (gnu packages qt)
  #:use-module (gnu packages rdf)
  #:use-module (gnu packages readline)
  #:use-module (gnu packages sdl)
  #:use-module (gnu packages serialization)
  #:use-module (gnu packages telephony)
  #:use-module (gnu packages linphone)
  #:use-module (gnu packages tls)
  #:use-module (gnu packages valgrind)
  #:use-module (gnu packages video)
  #:use-module (gnu packages vim) ;xxd
  #:use-module (gnu packages webkit)
  #:use-module (gnu packages wxwidgets)
  #:use-module (gnu packages xiph)
  #:use-module (gnu packages xml)
  #:use-module (gnu packages xorg)
  #:use-module (guix build-system cmake)
  #:use-module (guix build-system glib-or-gtk)
  #:use-module (guix build-system gnu)
  #:use-module (guix build-system meson)
  #:use-module (guix build-system python)
  #:use-module (guix build-system trivial)
  #:use-module (guix build-system waf)
  #:use-module (guix download)
  #:use-module (guix git-download)
  #:use-module ((guix licenses) #:prefix license:)
  #:use-module (guix packages)
  #:use-module (guix utils)
  #:use-module (srfi srfi-1)
  #:use-module (srfi srfi-26))

(define-public vo-amrwbenc
  (package
    (name "vo-amrwbenc")
    (version "0.1.3")
    (source
     (origin
       (method url-fetch)
       (uri
        (string-append "https://sourceforge.net/projects/opencore-amr/files/"
                       name "/" name "-" version ".tar.gz"))
       (sha256
        (base32 "0klx3nkidc6b8aawchpk19n3xlrzgnc046w4gd0rdqphw28v6ljn"))))
    (build-system gnu-build-system)
    (synopsis "Adaptive Multi Rate Codec")
    (description "VO-AMR is a library of VisualOn implementation of
Adaptive Multi Rate Narrowband and Wideband (AMR-NB and AMR-WB) speech codec.")
    (home-page "https://sourceforge.net/projects/opencore-amr/")
    (license license:asl2.0)))

(define-public opencore-amr
  (package
    (name "opencore-amr")
    (version "0.1.5")
    (source
     (origin
       (method url-fetch)
       (uri
        (string-append "https://sourceforge.net/projects/opencore-amr/files/"
                       name "/" name "-" version ".tar.gz"))
       (sha256
        (base32 "0hfk9khz3by0119h3jdwgdfd7jgkdbzxnmh1wssvylgnsnwnq01c"))))
    (build-system gnu-build-system)
    (synopsis "Adaptive Multi Rate Codec")
    (description "OpenCore-AMR is a library of OpenCORE Framework
implementation of Adaptive Multi Rate Narrowband and Wideband
(AMR-NB and AMR-WB) speech codec.")
    (home-page "https://sourceforge.net/projects/opencore-amr/")
    (license license:asl2.0)))

(define-public alsa-modular-synth
  (package
    (name "alsa-modular-synth")
    (version "2.1.2")
    (source (origin
              (method url-fetch)
              (uri (string-append "mirror://sourceforge/alsamodular/alsamodular"
                                  "/" version "/ams-" version ".tar.bz2"))
              (sha256
               (base32
                "1azbrhpfk4nnybr7kgmc7w6al6xnzppg853vas8gmkh185kk11l0"))
              (patches
               (search-patches "alsa-modular-synth-fix-vocoder.patch"))))
    (build-system gnu-build-system)
    (arguments
     `(#:configure-flags
       '("--enable-qt5"
         "CXXFLAGS=-std=gnu++11")
       #:phases
       (modify-phases %standard-phases
         (add-after 'set-paths 'hide-default-gcc
           (lambda* (#:key inputs #:allow-other-keys)
             (let ((gcc (assoc-ref inputs "gcc")))
               ;; Remove the default GCC from CPLUS_INCLUDE_PATH to prevent
               ;; conflicts with the GCC 5 input.
               (setenv "CPLUS_INCLUDE_PATH"
                       (string-join
                        (delete (string-append gcc "/include/c++")
                                (string-split (getenv "CPLUS_INCLUDE_PATH") #\:))
                        ":"))
               #t)))
         ;; Insert an extra space between linker flags.
         (add-before 'configure 'add-missing-space
           (lambda _
             (substitute* "configure"
               (("LIBS\\+=\\$LIBSsave") "LIBS+=\" $LIBSsave\"")
               (("CFLAGS\\+=\\$CFLAGSsave") "CFLAGS+=\" $CFLAGSsave\""))
             #t)))))
    (inputs
     `(("alsa-lib" ,alsa-lib)
       ;; We cannot use zita-alsa-pcmi (the successor of clalsadrv) due to
       ;; license incompatibility.
       ("clalsadrv" ,clalsadrv)
       ("fftw" ,fftw)
       ("jack" ,jack-1)
       ("ladspa" ,ladspa)
       ("liblo" ,liblo)
       ("qtbase" ,qtbase)))
    (native-inputs
     `(("pkg-config" ,pkg-config)
       ("qttools" ,qttools)
       ("gcc@5" ,gcc-5)))
    (home-page "http://alsamodular.sourceforge.net/")
    (synopsis "Realtime modular synthesizer and effect processor")
    (description
     "AlsaModularSynth is a digital implementation of a classical analog
modular synthesizer system.  It uses virtual control voltages to control the
parameters of the modules.  The control voltages which control the frequency
e.g. of the VCO (Voltage Controlled Oscillator) and VCF (Voltage Controlled
Filter) modules follow the convention of 1V / Octave.")
    (license license:gpl2)))

(define-public aubio
  (package
    (name "aubio")
    (version "0.4.9")
    (source (origin
             (method url-fetch)
             (uri (string-append
                   "https://aubio.org/pub/aubio-" version ".tar.bz2"))
             (sha256
              (base32
               "1npks71ljc48w6858l9bq30kaf5nph8z0v61jkfb70xb9np850nl"))))
    (build-system waf-build-system)
    (arguments
     `(#:tests? #f                      ; no check target
       #:configure-flags
       (list
        (string-append "LDFLAGS=-Wl,-rpath=" (assoc-ref %outputs "out") "/lib")
        "--enable-fftw3f"
        "--enable-jack"
        "--enable-sndfile"
        "--enable-samplerate"
        "--enable-avcodec")
       #:python ,python-2))
    (inputs
     `(("jack" ,jack-1)
       ("libsndfile" ,libsndfile)
       ("libsamplerate" ,libsamplerate)
       ("fftwf" ,fftwf)
       ("ffmpeg" ,ffmpeg))) ; for libavcodec
    (native-inputs
     `(("pkg-config" ,pkg-config)))
    (home-page "https://aubio.org/")
    (synopsis "Library for audio labelling")
    (description
     "aubio is a tool designed for the extraction of annotations from audio
signals.  Its features include segmenting a sound file before each of its
attacks, performing pitch detection, tapping the beat and producing MIDI
streams from live audio.")
    (license license:gpl3+)))

(define (ardour-rpath-phase major-version)
  `(lambda* (#:key outputs #:allow-other-keys)
     (let ((libdir (string-append (assoc-ref outputs "out")
                                  "/lib/ardour" ,major-version)))
       (substitute* "wscript"
         (("linker_flags = \\[\\]")
          (string-append "linker_flags = [\""
                         "-Wl,-rpath="
                         libdir ":"
                         libdir "/backends" ":"
                         libdir "/engines" ":"
                         libdir "/panners" ":"
                         libdir "/surfaces" ":"
                         libdir "/vamp" "\"]"))))
     #t))

(define-public ardour
  (package
    (name "ardour")
    (version "5.12")
    (source (origin
              (method git-fetch)
              (uri (git-reference
                    (url "https://git.ardour.org/ardour/ardour.git")
                    (commit version)))
              (snippet
               ;; Ardour expects this file to exist at build time.  The revision
               ;; is the output of
               ;;    git describe HEAD | sed 's/^[A-Za-z]*+//'
               `(call-with-output-file
                    "libs/ardour/revision.cc"
                  (lambda (port)
                    (format port ,(string-append "#include \"ardour/revision.h\"
namespace ARDOUR { const char* revision = \"" version "\" ; }"))
                    #t)))
              (sha256
               (base32
                "0mla5lm51ryikc2rrk53max2m7a5ds6i1ai921l2h95wrha45nkr"))
              (file-name (string-append name "-" version))))
    (build-system waf-build-system)
    (arguments
     `(#:configure-flags '("--cxx11"          ; required by gtkmm
                           "--no-phone-home"  ; don't contact ardour.org
                           "--freedesktop"    ; build .desktop file
                           "--test")          ; build unit tests
       #:phases
       (modify-phases %standard-phases
         (add-after 'unpack 'set-rpath-in-LDFLAGS
          ,(ardour-rpath-phase (version-major version)))
         (add-after 'install 'install-freedesktop-files
           (lambda* (#:key outputs #:allow-other-keys)
             (let* ((out   (assoc-ref outputs "out"))
                    (share (string-append out "/share"))
                    (ver   ,(version-major version)))
               (for-each
                 (lambda (size)
                   (let ((dir (string-append share "/icons/hicolor/"
                                             size "x" size "/apps")))
                     (mkdir-p dir)
                     (copy-file
                       (string-append "gtk2_ardour/resources/Ardour-icon_"
                                      size "px.png")
                       (string-append dir "/ardour" ver ".png"))))
                 '("16" "22" "32" "48" "256"))
               (install-file (string-append "build/gtk2_ardour/ardour"
                                            ver ".desktop")
                             (string-append share "/applications/"))
               (install-file (string-append "build/gtk2_ardour/ardour"
                                            ver ".appdata.xml")
                             (string-append share "/appdata/")))
             #t)))
       #:test-target "test"
       #:python ,python-2))
    (inputs
     `(("alsa-lib" ,alsa-lib)
       ("atkmm" ,atkmm)
       ("aubio" ,aubio)
       ("boost" ,boost)
       ("cairomm" ,cairomm)
       ("curl" ,curl)
       ("eudev" ,eudev)
       ("fftw" ,fftw)
       ("fftwf" ,fftwf)
       ("flac" ,flac)
       ("glibmm" ,glibmm)
       ("gtkmm" ,gtkmm-2)
       ("jack" ,jack-1)
       ("libarchive" ,libarchive)
       ("libart-lgpl" ,libart-lgpl)
       ("libgnomecanvasmm" ,libgnomecanvasmm)
       ("liblo" ,liblo)
       ("libogg" ,libogg)
       ("libsamplerate" ,libsamplerate)
       ("libsndfile" ,libsndfile)
       ("libusb" ,libusb)
       ("libvorbis" ,libvorbis)
       ("libxml2" ,libxml2)
       ("lilv" ,lilv)
       ("lrdf" ,lrdf)
       ("lv2" ,lv2)
       ("pangomm" ,pangomm)
       ("python-rdflib" ,python-rdflib)
       ("readline" ,readline)
       ("redland" ,redland)
       ("rubberband" ,rubberband)
       ("serd" ,serd)
       ("sord" ,sord)
       ("sratom" ,sratom)
       ("suil" ,suil)
       ("taglib" ,taglib)
       ("vamp" ,vamp)))
    (native-inputs
     `(("cppunit" ,cppunit)
       ("gettext" ,gettext-minimal)
       ("itstool" ,itstool)
       ("perl" ,perl)
       ("pkg-config" ,pkg-config)))
    (home-page "https://ardour.org")
    (synopsis "Digital audio workstation")
    (description
     "Ardour is a multi-channel digital audio workstation, allowing users to
record, edit, mix and master audio and MIDI projects.  It is targeted at audio
engineers, musicians, soundtrack editors and composers.")
    (license license:gpl2+)))

(define-public audacity
  (package
    (name "audacity")
    (version "2.4.1")
    (source
     (origin
       (method git-fetch)
       (uri (git-reference
             (url "https://github.com/audacity/audacity")
             (commit (string-append "Audacity-" version))))
       (file-name (git-file-name name version))
       (sha256
        (base32
         "1xk0piv72d2xd3p7igr916fhcbrm76fhjr418k1rlqdzzg1hfljn"))
       (patches (search-patches "audacity-build-with-system-portaudio.patch"))
       (modules '((guix build utils)))
       (snippet
        ;; Remove bundled libraries.
        '(begin
           (for-each
            (lambda (dir)
              (delete-file-recursively (string-append "lib-src/" dir)))
            '("expat" "ffmpeg" "lame" "libflac" "libid3tag" "libmad" "libogg"
              "libsndfile" "libsoxr" "libvamp" "libvorbis" "lv2"
              "portaudio-v19" "portmidi" "soundtouch" "twolame"
              ;; FIXME: these libraries have not been packaged yet:
              ;; "libnyquist"
              ;; "libscorealign"
              ;; "libwidgetextra"
              ;; "portburn"
              ;; "portsmf"
              ;; "portmixer"

              ;; FIXME: we have this library, but it differs in that the Slide
              ;; class does not have a member "getInverseStretchedTime".
              ;; "sbsms"
              ))
           #t))))
    (build-system glib-or-gtk-build-system)
    (inputs
     `(("wxwidgets" ,wxwidgets)
       ("gtk+" ,gtk+)
       ("alsa-lib" ,alsa-lib)
       ("jack" ,jack-1)
       ("expat" ,expat)
       ("ffmpeg" ,ffmpeg)
       ("lame" ,lame)
       ("flac" ,flac)
       ("libid3tag" ,libid3tag)
       ("libmad" ,libmad)
       ;;("libsbsms" ,libsbsms)         ;bundled version is modified
       ("libsndfile" ,libsndfile)
       ("soundtouch" ,soundtouch)
       ("soxr" ,soxr)                   ;replaces libsamplerate
       ("twolame" ,twolame)
       ("vamp" ,vamp)
       ("libvorbis" ,libvorbis)
       ("lv2" ,lv2)
       ("lilv" ,lilv)                   ;for lv2
       ("suil" ,suil)                   ;for lv2
       ("portaudio" ,portaudio)
       ("portmidi" ,portmidi)))
    (native-inputs
     `(("autoconf" ,autoconf)
       ("automake" ,automake)
       ("gettext" ,gettext-minimal)     ;for msgfmt
       ("libtool" ,libtool)
       ("pkg-config" ,pkg-config)
       ("python" ,python-2)
       ("which" ,which)))
    (arguments
     `(#:configure-flags
       (let ((libid3tag (assoc-ref %build-inputs "libid3tag"))
             (libmad (assoc-ref %build-inputs "libmad"))
             (portmidi (assoc-ref %build-inputs "portmidi")))
         (list
          ;; Loading FFmpeg dynamically is problematic.
          "--disable-dynamic-loading"
          ;; SSE instructions are available on Intel systems only.
          ,@(if (any (cute string-prefix? <> (or (%current-target-system)
                                                 (%current-system)))
                    '("x64_64" "i686"))
              '()
              '("--enable-sse=no"))
          ;; portmidi, libid3tag and libmad provide no .pc files, so
          ;; pkg-config fails to find them.  Force their inclusion.
          (string-append "ID3TAG_CFLAGS=-I" libid3tag "/include")
          (string-append "ID3TAG_LIBS=-L" libid3tag "/lib -lid3tag -lz")
          (string-append "LIBMAD_CFLAGS=-I" libmad "/include")
          (string-append "LIBMAD_LIBS=-L" libmad "/lib -lmad")
          (string-append "PORTMIDI_CFLAGS=-I" portmidi "/include")
          (string-append "PORTMIDI_LIBS=-L" portmidi "/lib -lportmidi")
          "EXPAT_USE_SYSTEM=yes"
          "FFMPEG_USE_SYSTEM=yes"
          "LAME_USE_SYSTEM=yes"
          "LIBFLAC_USE_SYSTEM=yes"
          "LIBID3TAG_USE_SYSTEM=yes"
          "LIBMAD_USE_SYSTEM=yes"
          "USE_LOCAL_LIBNYQUIST="      ;not packaged yet
          ;;"LIBSBSMS_USE_SYSTEM=yes"  ;bundled version is patched
          "LIBSNDFILE_USE_SYSTEM=yes"
          "LIBSOUNDTOUCH_USE_SYSTEM=yes"
          "LIBSOXR_USE_SYSTEM=yes"
          "LIBTWOLAME_USE_SYSTEM=yes"
          "LIBVAMP_USE_SYSTEM=yes"
          "LIBVORBIS_USE_SYSTEM=yes"
          "LV2_USE_SYSTEM=yes"
          "PORTAUDIO_USE_SYSTEM=yes"))
       #:phases
       (modify-phases %standard-phases
         (add-after 'unpack 'fix-sbsms-check
           (lambda _
             ;; This check is wrong: there is no 2.2.0 release; not even the
             ;; bundled sources match this release string.
             (substitute* '("m4/audacity_checklib_libsbsms.m4"
                            "configure")
               (("sbsms >= 2.2.0") "sbsms >= 2.0.0"))
             #t))
         (add-after 'unpack 'use-upstream-headers
           (lambda* (#:key inputs #:allow-other-keys)
             (substitute* '("src/NoteTrack.cpp"
                            "src/AudioIO.cpp"
                            "src/AudioIO.h"
                            "src/AudioIOBase.cpp")
               (("../lib-src/portmidi/pm_common/portmidi.h") "portmidi.h")
               (("../lib-src/portmidi/porttime/porttime.h") "porttime.h"))
             (substitute* "src/prefs/MidiIOPrefs.cpp"
               (("../../lib-src/portmidi/pm_common/portmidi.h") "portmidi.h"))
             #t)))
       ;; The test suite is not "well exercised" according to the developers,
       ;; and fails with various errors.  See
       ;; <http://sourceforge.net/p/audacity/mailman/message/33524292/>.
       #:tests? #f))
    (home-page "https://www.audacityteam.org/")
    (synopsis "Software for recording and editing sounds")
    (description
     "Audacity is a multi-track audio editor designed for recording, playing
and editing digital audio.  It features digital effects and spectrum analysis
tools.")
    (license license:gpl2+)))

(define-public audiofile
  (package
    (name "audiofile")
    (version "0.3.6")
    (source
     (origin
       (method url-fetch)
       (uri (string-append
             "https://audiofile.68k.org/audiofile-" version ".tar.gz"))
       (sha256
        (base32 "0rb927zknk9kmhprd8rdr4azql4gn2dp75a36iazx2xhkbqhvind"))
       (patches
        ;; CVE references according to nixpgs
        (search-patches
         "audiofile-fix-datatypes-in-tests.patch"
         "audiofile-fix-sign-conversion.patch"
         "audiofile-hurd.patch"
         "audiofile-CVE-2015-7747.patch"
         ;; CVE-2017-6829:
         "audiofile-Fix-index-overflow-in-IMA.cpp.patch"
         ;; CVE-2017-6827, CVE-2017-6828, CVE-2017-6832, CVE-2017-6835,
         ;; CVE-2017-6837:
         "audiofile-Check-the-number-of-coefficients.patch"
         ;; CVE-2017-6839:
         "audiofile-Fix-overflow-in-MSADPCM-decodeSam.patch"
         ;; CVE-2017-6830, CVE-2017-6834, CVE-2017-6836, CVE-2017-6838:
         "audiofile-Fix-multiply-overflow-sfconvert.patch"
         "audiofile-signature-of-multiplyCheckOverflow.patch"
         ;; CVE-2017-6831:
         "audiofile-Fail-on-error-in-parseFormat.patch"
         ;; CVE-2017-6833:
         "audiofile-division-by-zero-BlockCodec-runPull.patch"
         "audiofile-CVE-2018-13440.patch"
         "audiofile-CVE-2018-17095.patch"))))
    (build-system gnu-build-system)
    (inputs
     `(("alsa-lib" ,alsa-lib)))
    (home-page "https://audiofile.68k.org/")
    (synopsis "Library to handle various audio file formats")
    (description "This is an open-source version of SGI's audiofile library.
It provides a uniform programming interface for processing of audio data to
and from audio files of many common formats.

Currently supported file formats include AIFF/AIFF-C, WAVE, and NeXT/Sun
.snd/.au, BICS, and raw data.  Supported compression formats are currently
G.711 mu-law and A-law.")
    (license license:lgpl2.1+)))

(define-public autotalent
  (package
    (name "autotalent")
    (version "0.2")
    (source (origin
              (method url-fetch)
              (uri (string-append "http://tombaran.info/autotalent-"
                                  version ".tar.gz"))
              (sha256
               (base32
                "1n04qm66f14195ly6gsy3ra7v2j7zad5n19d8dwfmh0qs6h9hphh"))))
    (build-system gnu-build-system)
    (arguments
     `(#:tests? #f ; no check target
       #:phases
       (modify-phases %standard-phases
         ;; no configure script
         (delete 'configure)
         (add-before 'install 'prepare-target-directory
           (lambda* (#:key outputs #:allow-other-keys)
             (mkdir-p (string-append (assoc-ref outputs "out") "/lib/ladspa"))
             #t))
         (add-after 'unpack 'override-target-directory
           (lambda* (#:key outputs #:allow-other-keys)
             (substitute* "Makefile"
               (("/usr/lib64/ladspa")
                (string-append (assoc-ref outputs "out") "/lib/ladspa")))
             #t)))))
    (inputs
     `(("ladspa" ,ladspa)))
    (home-page "http://tombaran.info/autotalent.html")
    (synopsis "Pitch-correction LADSPA audio plugin")
    (description
     "Autotalent is a LADSPA plugin for real-time pitch-correction.  Among its
controls are allowable notes, strength of correction, LFO for vibrato and
formant warp.")
    ;; All code except the FFT routine is licensed under GPLv2+.
    ;; The FFT routine is under BSD-3.
    (license license:gpl2+)))

(define-public azr3
  (package
    (name "azr3")
    (version "1.2.3")
    (source (origin
              (method url-fetch)
              (uri (string-append "mirror://savannah/ll-plugins/azr3-jack-"
                                  version
                                  ".tar.bz2"))
              (sha256
               (base32
                "18mdw6nc0vgj6k9rsy0x8w64wvzld0frqshrxxbxfj9qi9843vlc"))
              (patches (search-patches "azr3.patch"))))
    (build-system gnu-build-system)
    (arguments
     `(#:tests? #f ; no check target
       #:make-flags
       (list "LV2PEG=ttl2c"
             (string-append "prefix=" %output)
             (string-append "pkgdatadir=" %output "/share/azr3-jack"))
       #:phases
       (modify-phases %standard-phases
         (add-before 'install 'fix-timestamp
           (lambda _
             (let ((early-1980 315619200)) ; 1980-01-02 UTC
               (utime "azr3.1" early-1980 early-1980))
             #t)))))
    (inputs
     `(("gtkmm" ,gtkmm-2)
       ("lvtk" ,lvtk)
       ("jack" ,jack-1)
       ("lash" ,lash)))
    (native-inputs
     `(("pkg-config" ,pkg-config)))
    (home-page "http://ll-plugins.nongnu.org/azr3/")
    (synopsis "Tonewheel organ synthesizer")
    (description
     "AZR-3 is a port of the free VST plugin AZR-3.  It is a tonewheel organ
with drawbars, distortion and rotating speakers.  The organ has three
sections, two polyphonic sections with nine drawbars each and one monophonic
bass section with five drawbars.  A standalone JACK application and LV2
plugins are provided.")
    (license license:gpl2)))

(define-public calf
  (package
    (name "calf")
    (version "0.90.3")
    (source (origin
              (method url-fetch)
              (uri (string-append "https://calf-studio-gear.org/files/calf-"
                                  version ".tar.gz"))
              (sha256
               (base32
                "17x4hylgq4dn9qycsdacfxy64f5cv57n2qgkvsdp524gnqzw4az3"))))
    (build-system gnu-build-system)
    (inputs
     `(("fluidsynth" ,fluidsynth)
       ("expat" ,expat)
       ("glib" ,glib)
       ("gtk" ,gtk+-2)
       ("cairo" ,cairo)
       ("lash" ,lash)
       ("jack" ,jack-1)
       ("lv2" ,lv2)
       ("ladspa" ,ladspa)
       ("fftw" ,fftw)))
    (native-inputs
     `(("pkg-config" ,pkg-config)))
    (native-search-paths
     (list (search-path-specification
            (variable "LV2_PATH")
            (files '("lib/lv2")))))
    (home-page "http://calf.sourceforge.net/")
    (synopsis "Audio plug-in pack for LV2 and JACK environments")
    (description
     "Calf Studio Gear is an audio plug-in pack for LV2 and JACK environments.
The suite contains lots of effects (delay, modulation, signal processing,
filters, equalizers, dynamics, distortion and mastering effects),
instruments (SF2 player, organ simulator and a monophonic synthesizer) and
tools (analyzer, mono/stereo tools, crossovers).")
    ;; calfjackhost is released under GPLv2+
    ;; The plugins are released under LGPLv2.1+
    (license (list license:lgpl2.1+ license:gpl2+))))

(define-public caps-plugins-lv2
  (package
    (name "caps-plugins-lv2")
    (version "0.9.24") ; version that has been ported.
    (source
     (origin
       ;; The Github project hasn't tagged a release.
       (method git-fetch)
       (uri (git-reference
             ;; Actually https://github.com/moddevices/caps-lv2.git, but it's
             ;; missing fixes for newer glibc, so using the origin of a pull
             ;; request regarding this issue:
             (url "https://github.com/jujudusud/caps-lv2")
             (commit "9c9478b7fbd8f9714f552ebe2a6866398b0babfb")))
       (file-name (git-file-name name version))
       (sha256
        (base32
         "1idfnazin3cca41zw1a8vwgnxjnkrap7bxxjamjqvgpmvydgcam1"))))
    (build-system gnu-build-system)
    (arguments
     `(#:tests? #f ; no check target
       #:phases
       (modify-phases %standard-phases
         ;; no configure script
         (delete 'configure)
         (add-after 'unpack 'override-target-directory
           (lambda* (#:key outputs #:allow-other-keys)
             (substitute* (find-files "plugins" "Makefile")
               (("/usr/local")(assoc-ref outputs "out")))
             #t)))))
    (inputs
     `(("lv2" ,lv2)))
    ;; home-page of the original LADSPA version: http://quitte.de/dsp/caps.html
    (home-page "https://github.com/moddevices/caps-lv2")
    (synopsis "LV2 port of the CAPS audio plugin colection")
    (description
     "LV2 port of CAPS, a collection of audio plugins comprising basic virtual
guitar amplification and a small range of classic effects, signal processors and
generators of mostly elementary and occasionally exotic nature.")
    (license license:gpl3+)))

(define-public infamous-plugins
  (package
    (name "infamous-plugins")
    (version "0.2.04")
    (source (origin
              (method git-fetch)
              (uri (git-reference
                    (url "https://github.com/ssj71/infamousPlugins")
                    (commit (string-append "v" version))))
              (file-name (git-file-name name version))
              (sha256
               (base32
                "0hmqk80w4qxq09iag7b7srf2g0wigkyhzq0ywxvhz2iz0hq9k0dh"))))
    (build-system cmake-build-system)
    (arguments
     `(#:tests? #f                      ; there are no tests
       #:phases
       (modify-phases %standard-phases
         (add-after 'unpack 'remove-compiler-flags
           (lambda _
             (substitute* (find-files "." "CMakeLists.txt")
               (("-msse2 -mfpmath=sse") ""))
             #t)))))
    (inputs
     `(("cairo" ,cairo)
       ("fftwf" ,fftwf)
       ("lv2" ,lv2)
       ("ntk" ,ntk)
       ("zita-resampler" ,zita-resampler)))
    (native-inputs
     `(("pkg-config" ,pkg-config)))
    (home-page "https://ssj71.github.io/infamousPlugins")
    (synopsis "LV2 plugins for live use")
    (description
     "The infamous plugins are a collection of LV2 audio plugins for live
performances.  The plugins include a cellular automaton synthesizer, an
envelope follower, distortion effects, tape effects and more.")
    (license license:gpl2+)))

(define-public swh-plugins
  (package
    (name "swh-plugins")
    (version "0.4.17")
    (source (origin
              (method git-fetch)
              (uri (git-reference
                    (url "https://github.com/swh/ladspa")
                    (commit (string-append "v" version))))
              (file-name (git-file-name name version))
              (sha256
               (base32
                "1c98z2xxz9pgcb4dg99gz8qrylh5cnag0j18a52d88ifsy24isvq"))))
    (native-inputs
     `(("autoconf" ,autoconf)
       ("automake" ,automake)
       ("gettext" ,gettext-minimal) ;for autopoint
       ("libtool" ,libtool)
       ("perl" ,perl)
       ("pkg-config" ,pkg-config)
       ("which" ,which)))
    (inputs
     `(("fftwf" ,fftwf)
       ("perl-xml-parser" ,perl-xml-parser)))
    (build-system gnu-build-system)
    (home-page "http://plugin.org.uk")
    (synopsis "The SWH Plugins package for the LADSPA plugin system")
    (description "This package provides Steve Harris's LADSPA plugins.")
    (license license:gpl2+)))

(define-public swh-plugins-lv2
  (package
    (name "swh-plugins-lv2")
    (version "1.0.16")
    (source (origin
              (method git-fetch)
              (uri (git-reference
                    (url "https://github.com/swh/lv2")
                    (commit (string-append "v" version))))
              (file-name (git-file-name name version))
              (sha256
               (base32
                "0y7nnww864mm4k6ayy2lhcws3wlbhb2gkyjbrwk921fvc18qk9mz"))))
    (build-system gnu-build-system)
    (arguments
     `(#:tests? #f ; no check target
       #:make-flags (list "CC=gcc"
                          (string-append "PREFIX="
                                         (assoc-ref %outputs "out")))
       #:phases
       (modify-phases %standard-phases
         ;; no configure script
         (delete 'configure)
         (add-after 'unpack 'patch-makefile-and-enter-directory
           ;; The default install target doesn't install, but the
           ;; "install-system" target does.
           (lambda _
             (substitute* "Makefile"
               (("install:") "install: install-system"))
             #t)))))
    (inputs
     `(("lv2" ,lv2)
       ("fftwf" ,fftwf)))
    (native-inputs
     `(("libxslt" ,libxslt)
       ("pkg-config" ,pkg-config)))
    (home-page "http://plugin.org.uk")
    (synopsis "SWH plugins in LV2 format")
    (description
     "Swh-plugins-lv2 is a collection of audio plugins in LV2 format.  Plugin
classes include: dynamics (compressor, limiter), time (delay, chorus,
flanger), ringmodulator, distortion, filters, pitchshift, oscillators,
emulation (valve, tape), bit fiddling (decimator, pointer-cast), etc.")
    (license license:gpl3+)))

(define-public tao
  (package
    (name "tao")
    (version "1.0-beta-10May2006")
    (source (origin
              (method url-fetch)
              (uri (string-append "mirror://sourceforge/taopm/Tao/"
                                  "tao-" version "/"
                                  "tao-" version ".tar.gz"))
              (sha256
               (base32
                "156py3g6mmglldfd0j76bn7n242hdwf49diaprjpj7crp8vgf2pz"))
              (patches
               (search-patches "tao-add-missing-headers.patch"
                               "tao-fix-parser-types.patch"))
              (modules '((guix build utils)))
              (snippet
               '(begin
                  (substitute* "configure"
                    (("SHELL=/bin/sh") ""))
                  #t))))
    (build-system gnu-build-system)
    (arguments
     '(#:configure-flags '("TAO_RELEASE=-beta")
       #:phases
       (modify-phases %standard-phases
         (add-after 'unpack 'fix-references
           (lambda* (#:key outputs #:allow-other-keys)
             (substitute* "user-scripts/tao.in"
               (("taoparse")
                (string-append (assoc-ref outputs "out") "/bin/taoparse"))
               (("grep") (which "grep"))
               (("sed -f \\$distdir/user-scripts/")
                (string-append (which "sed") " -f $distdir/"))
               (("distdir=.*")
                (string-append "distdir="
                               (assoc-ref outputs "out") "/share/tao")))
             #t))
         (add-after 'install 'install-extra-files
           (lambda* (#:key outputs #:allow-other-keys)
             (let* ((out (assoc-ref outputs "out"))
                    (share (string-append out "/share/tao/"))
                    (inc (string-append out "/include/tao/")))
               (mkdir-p share)
               (mkdir-p inc)
               (install-file "user-scripts/error.parse" share)
               (copy-recursively "examples" (string-append share "examples"))
               (for-each (lambda (file) (install-file file inc))
                         (find-files "include" "\\.h"))
               #t))))))
    (inputs
     `(("audiofile" ,audiofile)
       ("libxi" ,libxi)
       ("libxmu" ,libxmu)
       ("mesa" ,mesa)
       ("glut" ,freeglut)
       ("flex" ,flex)
       ("bison" ,bison)
       ("sed" ,sed)
       ("grep" ,grep)))
    (home-page "http://taopm.sourceforge.net/")
    (synopsis "Sound Synthesis with Physical Models")
    (description "Tao is a software package for sound synthesis using physical
models.  It provides a virtual acoustic material constructed from masses and
springs which can be used as the basis for building quite complex virtual
musical instruments.  Tao comes with a synthesis language for creating and
playing instruments and a C++ API for those who would like to use it as an
object library.")
    (license license:gpl2+)))

(define-public csound
  (package
    (name "csound")
    (version "6.14.0")
    (source
     (origin
       (method git-fetch)
       (uri (git-reference
             (url "https://github.com/csound/csound")
             (commit version)))
       (file-name (git-file-name name version))
       (sha256
        (base32 "1sr9knfhbm2m0wpkjq2l5n471vnl51wy4p6j4m95zqybimzb4s2j"))))
    (build-system cmake-build-system)
    (native-inputs
     `(("bison" ,bison)
       ("flex" ,flex)
       ("gettext" ,gettext-minimal)
       ("zlib" ,zlib)))
    (inputs
     `(("alsa-lib" ,alsa-lib)
       ("boost" ,boost)
       ("jack" ,jack-1)
       ("ladspa" ,ladspa)
       ("liblo" ,liblo)
       ("libsndfile" ,libsndfile)
       ("pulseaudio" ,pulseaudio)))
    (home-page "https://csound.com/")
    (synopsis "Sound and music computing system")
    (description
     "Csound is a user-programmable and user-extensible sound processing
language and software synthesizer.")
    (license license:lgpl2.1+)))

(define-public clalsadrv
  (package
    (name "clalsadrv")
    (version "2.0.0")
    (source (origin
              (method url-fetch)
              (uri (string-append
                    "http://kokkinizita.linuxaudio.org"
                    "/linuxaudio/downloads/clalsadrv-"
                    version ".tar.bz2"))
              (sha256
               (base32
                "0bsacx3l9065gk8g4137qmz2ij7s9x06aldvacinzlcslw7bd1kq"))))
    (build-system gnu-build-system)
    (arguments
     `(#:tests? #f ; no "check" target
       #:make-flags (list (string-append "PREFIX=" (assoc-ref %outputs "out")))
       #:phases
       (modify-phases %standard-phases
         (add-after 'unpack 'patch-makefile-and-enter-directory
           (lambda _
             (substitute* "libs/Makefile"
               (("/sbin/ldconfig") "true")
               (("^LIBDIR =.*") "LIBDIR = lib\n"))
             (chdir "libs")
             #t))
         (add-after 'install 'install-symlink
           (lambda _
             (symlink "libclalsadrv.so"
                      (string-append (assoc-ref %outputs "out")
                                     "/lib/libclalsadrv.so.2"))
             #t))
         ;; no configure script
         (delete 'configure))))
    (inputs
     `(("alsa-lib" ,alsa-lib)
       ("fftw" ,fftw)))
    (home-page "https://kokkinizita.linuxaudio.org")
    (synopsis "C++ wrapper around the ALSA API")
    (description
     "clalsadrv is a C++ wrapper around the ALSA API simplifying access to
ALSA PCM devices.")
    (license license:gpl2+)))

(define-public amb-plugins
  (package
    (name "amb-plugins")
    (version "0.8.1")
    (source (origin
              (method url-fetch)
              (uri (string-append
                    "http://kokkinizita.linuxaudio.org"
                    "/linuxaudio/downloads/AMB-plugins-"
                    version ".tar.bz2"))
              (sha256
               (base32
                "0x4blm4visjqj0ndqr0cg776v3b7lvplpc8cgi9n51llhavn0jpl"))))
    (build-system gnu-build-system)
    (arguments
     `(#:tests? #f ; no "check" target
       #:phases
       (modify-phases %standard-phases
         ;; no configure script
         (delete 'configure)
         (add-before 'install 'prepare-target-directory
           (lambda* (#:key outputs #:allow-other-keys)
             (mkdir-p (string-append (assoc-ref outputs "out") "/lib/ladspa"))
             #t))
         (add-after 'unpack 'override-target-directory-and-tool-paths
           (lambda* (#:key outputs #:allow-other-keys)
             (substitute* "Makefile"
               (("/usr/lib/ladspa")
                (string-append (assoc-ref outputs "out") "/lib/ladspa"))
               (("/usr/bin/install") (which "install"))
               (("/bin/rm") "#"))
             #t)))))
    (home-page "https://kokkinizita.linuxaudio.org")
    (synopsis "LADSPA ambisonics plugins")
    (description
     "The AMB plugins are a set of LADSPA ambisonics plugins, mainly to be
used within Ardour.  Features include: mono and stereo to B-format panning,
horizontal rotator, square, hexagon and cube decoders.")
    (license license:gpl2+)))

(define-public mcp-plugins
  (package
    (name "mcp-plugins")
    (version "0.4.0")
    (source (origin
              (method url-fetch)
              (uri (string-append
                    "http://kokkinizita.linuxaudio.org"
                    "/linuxaudio/downloads/MCP-plugins-"
                    version ".tar.bz2"))
              (sha256
               (base32
                "06a9r1l85jmg7l1cvc3788mk8ra0xagjfy1rmhw3b80y4n0vlnvc"))))
    (build-system gnu-build-system)
    (arguments
     `(#:tests? #f ; no "check" target
       #:phases
       (modify-phases %standard-phases
         ;; no configure script
         (delete 'configure)
         (add-before 'install 'prepare-target-directory
           (lambda* (#:key outputs #:allow-other-keys)
             (mkdir-p (string-append (assoc-ref outputs "out") "/lib/ladspa"))
             #t))
         (add-after 'unpack 'override-target-directory
           (lambda* (#:key outputs #:allow-other-keys)
             (substitute* "Makefile"
               (("/usr") (assoc-ref outputs "out")))
             #t)))))
    (home-page "https://kokkinizita.linuxaudio.org")
    (synopsis "Chorus, phaser, and vintage high-pass and low-pass filters")
    (description
     "This package provides various LADSPA plugins.  @code{cs_chorus} and
@code{cs_phaser} provide chorus and phaser effects, respectively;
@code{mvclpf24} provides four implementations of the low-pass filter used in
vintage Moog synthesizers; @code{mvchpf24} is based on the voltage-controlled
high-pass filter by Robert Moog.  The filters attempt to accurately emulate
the non-linear circuit elements of their original analog counterparts.")
    (license license:gpl2+)))

(define-public rev-plugins
  (package
    (name "rev-plugins")
    (version "0.7.1")
    (source (origin
              (method url-fetch)
              (uri (string-append
                    "http://kokkinizita.linuxaudio.org"
                    "/linuxaudio/downloads/REV-plugins-"
                    version ".tar.bz2"))
              (sha256
               (base32
                "1ikpinxm00pkfi259bnkzhsy3miagrjgdihaaf5x4v7zac29j3g7"))))
    (build-system gnu-build-system)
    (arguments
     `(#:tests? #f ; no "check" target
       #:phases
       (modify-phases %standard-phases
         ;; no configure script
         (delete 'configure)
         (add-before 'install 'prepare-target-directory
           (lambda* (#:key outputs #:allow-other-keys)
             (mkdir-p (string-append (assoc-ref outputs "out") "/lib/ladspa"))
             #t))
         (add-after 'unpack 'override-target-directory
           (lambda* (#:key outputs #:allow-other-keys)
             (substitute* "Makefile"
               (("/usr") (assoc-ref outputs "out")))
             #t)))))
    (home-page "https://kokkinizita.linuxaudio.org")
    (synopsis "LADSPA reverb plugin")
    (description
     "This package provides a stereo reverb LADSPA plugin based on the
well-known greverb.")
    (license license:gpl2+)))

(define-public fil-plugins
  (package
    (name "fil-plugins")
    (version "0.3.0")
    (source (origin
              (method url-fetch)
              (uri (string-append
                    "http://kokkinizita.linuxaudio.org"
                    "/linuxaudio/downloads/FIL-plugins-"
                    version ".tar.bz2"))
              (sha256
               (base32
                "1scfv9j7jrp50r565haa4rvxn1vk2ss86xssl5qgcr8r45qz42qw"))))
    (build-system gnu-build-system)
    (arguments
     `(#:tests? #f ; no "check" target
       #:phases
       (modify-phases %standard-phases
         ;; no configure script
         (delete 'configure)
         (add-before 'install 'prepare-target-directory
           (lambda* (#:key outputs #:allow-other-keys)
             (mkdir-p (string-append (assoc-ref outputs "out") "/lib/ladspa"))
             #t))
         (add-after 'unpack 'override-target-directory
           (lambda* (#:key outputs #:allow-other-keys)
             (substitute* "Makefile"
               (("/usr") (assoc-ref outputs "out")))
             #t)))))
    (home-page "https://kokkinizita.linuxaudio.org")
    (synopsis "LADSPA four-band parametric equalizer plugin")
    (description
     "This package provides a LADSPA plugin for a four-band parametric
equalizer.  Each section has an active/bypass switch, frequency, bandwidth and
gain controls.  There is also a global bypass switch and gain control.

The 2nd order resonant filters are implemented using a Mitra-Regalia style
lattice filter, which is stable even while parameters are being changed.

All switches and controls are internally smoothed, so they can be used @code{live}
without any clicks or zipper noises.  This makes this plugin suitable for use
in systems that allow automation of plugin control ports, such as Ardour, or
for stage use.")
    (license license:gpl2+)))

(define-public ste-plugins
  (package
    (name "ste-plugins")
    (version "0.0.2")
    (source (origin
              (method url-fetch)
              (uri (string-append
                    "http://kokkinizita.linuxaudio.org"
                    "/linuxaudio/downloads/STE-plugins-"
                    version ".tar.bz2"))
              (sha256
               (base32
                "0s3c9w5xihs87cnd1lh9xgj3maabjdyh6bl766qp5lhkg3ax8zy6"))))
    (build-system gnu-build-system)
    (arguments
     `(#:tests? #f ; no "check" target
       #:phases
       (modify-phases %standard-phases
         ;; no configure script
         (delete 'configure)
         (add-before 'install 'prepare-target-directory
           (lambda* (#:key outputs #:allow-other-keys)
             (mkdir-p (string-append (assoc-ref outputs "out") "/lib/ladspa"))
             #t))
         (add-after 'unpack 'override-target-directory
           (lambda* (#:key outputs #:allow-other-keys)
             (substitute* "Makefile"
               (("/usr") (assoc-ref outputs "out")))
             #t)))))
    (home-page "https://kokkinizita.linuxaudio.org")
    (synopsis "LADSPA stereo width plugin")
    (description
     "This package provides a LADSPA plugin to manipulate the stereo width of
audio signals.")
    (license license:gpl2+)))

(define-public vco-plugins
  (package
    (name "vco-plugins")
    (version "0.3.0")
    (source (origin
              (method url-fetch)
              (uri (string-append
                    "http://kokkinizita.linuxaudio.org"
                    "/linuxaudio/downloads/VCO-plugins-"
                    version ".tar.bz2"))
              (sha256
               (base32
                "1xzqdg3b07r7zww05y9bb737l9dxvfkv28m3fyak1aazaci3rsgl"))))
    (build-system gnu-build-system)
    (arguments
     `(#:tests? #f ; no "check" target
       #:phases
       (modify-phases %standard-phases
         ;; no configure script
         (delete 'configure)
         (add-before 'install 'prepare-target-directory
           (lambda* (#:key outputs #:allow-other-keys)
             (mkdir-p (string-append (assoc-ref outputs "out") "/lib/ladspa"))
             #t))
         (add-after 'unpack 'override-target-directory
           (lambda* (#:key outputs #:allow-other-keys)
             (substitute* "Makefile"
               (("/usr") (assoc-ref outputs "out"))
               (("/bin/cp") (which "cp")))
             #t)))))
    (home-page "https://kokkinizita.linuxaudio.org")
    (synopsis "LADSPA plugin for synthesizer oscillators")
    (description
     "The @code{blvco} LADSPA plugin provides three anti-aliased oscillators:

@enumerate
@item Pulse-VCO, a dirac pulse oscillator with flat amplitude spectrum
@item Saw-VCO, a sawtooth oscillator with 1/F amplitude spectrum
@item Rec-VCO, a square / rectangle oscillator
@end enumerate\n

All oscillators are low-pass filtered to provide waveforms similar to the
output of analog synthesizers such as the Moog Voyager.")
    (license license:gpl2+)))

(define-public wah-plugins
  (package
    (name "wah-plugins")
    (version "0.1.0")
    (source (origin
              (method url-fetch)
              (uri (string-append
                    "http://kokkinizita.linuxaudio.org"
                    "/linuxaudio/downloads/WAH-plugins-"
                    version ".tar.bz2"))
              (sha256
               (base32
                "1wkbjarxdhjixkh7d5abralj11dj2xxg644fz3ycd7qyfgfvjfgd"))))
    (build-system gnu-build-system)
    (arguments
     `(#:tests? #f ; no "check" target
       #:phases
       (modify-phases %standard-phases
         ;; no configure script
         (delete 'configure)
         (add-before 'install 'prepare-target-directory
           (lambda* (#:key outputs #:allow-other-keys)
             (mkdir-p (string-append (assoc-ref outputs "out") "/lib/ladspa"))
             #t))
         (add-after 'unpack 'override-target-directory
           (lambda* (#:key outputs #:allow-other-keys)
             (substitute* "Makefile"
               (("/usr") (assoc-ref outputs "out")))
             #t)))))
    (home-page "https://kokkinizita.linuxaudio.org")
    (synopsis "LADSPA Autowah effect plugin")
    (description
     "This package provides a LADSPA plugin for a Wah effect with envelope
follower.")
    (license license:gpl2+)))

(define-public g2reverb
  (package
    (name "g2reverb")
    (version "0.7.1")
    (source (origin
              (method url-fetch)
              (uri (string-append
                    "http://kokkinizita.linuxaudio.org"
                    "/linuxaudio/downloads/g2reverb-"
                    version ".tar.bz2"))
              (sha256
               (base32
                "18wb8vj1kky5glr76s34awbi8qzplsmf3wjbd7a12hfv4j0bkwrj"))))
    (build-system gnu-build-system)
    (arguments
     `(#:tests? #f ; no "check" target
       #:phases
       (modify-phases %standard-phases
         ;; no configure script
         (delete 'configure)
         (add-before 'install 'prepare-target-directory
           (lambda* (#:key outputs #:allow-other-keys)
             (mkdir-p (string-append (assoc-ref outputs "out") "/lib/ladspa"))
             #t))
         (add-after 'unpack 'override-target-directory
           (lambda* (#:key outputs #:allow-other-keys)
             (substitute* "Makefile"
               (("/usr") (assoc-ref outputs "out")))
             #t)))))
    (home-page "https://kokkinizita.linuxaudio.org")
    (synopsis "LADSPA stereo reverb plugin")
    (description
     "This package provides a LADSPA plugin for a stereo reverb effect.")
    (license license:gpl2+)))

(define-public fluidsynth
  (package
    (name "fluidsynth")
    (version "2.1.4")
    (source (origin
              (method git-fetch)
              (uri (git-reference
                    (url "https://github.com/FluidSynth/fluidsynth")
                    (commit (string-append "v" version))))
              (file-name (git-file-name name version))
              (sha256
               (base32
                "1r3khwyw57ybg5m4x0rvdzq7hgw2484sd52k6bm19akbw8yicfna"))))
    (build-system cmake-build-system)
    (arguments
     '(#:tests? #f                      ; no check target
       #:phases
       (modify-phases %standard-phases
         (add-after 'unpack 'fix-libdir
           (lambda _
             ;; Install libraries to /lib, not /lib64.
             (substitute* "CMakeLists.txt"
               (("LIB_SUFFIX \\$\\{_init_lib_suffix\\}")
                "LIB_SUFFIX \"\""))
             #t)))))
    (inputs
     `(("libsndfile" ,libsndfile)
       ("alsa-lib" ,alsa-lib)
       ("jack" ,jack-1)
       ("ladspa" ,ladspa)
       ("lash" ,lash)
       ("readline" ,readline)
       ("glib" ,glib)))
    (native-inputs
     `(("pkg-config" ,pkg-config)))
    (home-page "http://www.fluidsynth.org/")
    (synopsis "SoundFont synthesizer")
    (description
     "FluidSynth is a real-time software synthesizer based on the SoundFont 2
specifications.  FluidSynth reads and handles MIDI events from the MIDI input
device.  It is the software analogue of a MIDI synthesizer.  FluidSynth can
also play midifiles using a Soundfont.")
    (license license:lgpl2.1+)))

;; gzdoom@3.3.0 and lmms@1.1.3 requires this version.  Remove once no longer
;; needed.
(define-public fluidsynth-1
  (package
    (inherit fluidsynth)
    (version "1.1.11")
    (source (origin
              (inherit (package-source fluidsynth))
              (uri (git-reference
                    (url "https://github.com/FluidSynth/fluidsynth")
                    (commit (string-append "v" version))))
              (file-name (git-file-name "fluidsynth" version))
              (sha256
               (base32
                "0n75jq3xgq46hfmjkaaxz3gic77shs4fzajq40c8gk043i84xbdh"))))))

(define-public faad2
  (package
    (name "faad2")
    (version "2.8.6")
    (source (origin
              (method url-fetch)
              (uri (string-append "mirror://sourceforge/faac/faad2-src/faad2-"
                                  (version-major+minor version) ".0/"
                                  "faad2-" version ".tar.gz"))
              (sha256
               (base32
                "089zqykqgmmysznvk0bi2pfvdqwclnn540d0zks83sv2pynpfjb5"))))
    (build-system gnu-build-system)
    (home-page "https://www.audiocoding.com/faad2.html")
    (synopsis "MPEG-4 and MPEG-2 AAC decoder")
    (description
     "FAAD2 is an MPEG-4 and MPEG-2 AAC decoder supporting LC, Main, LTP, SBR,
PS, and DAB+.")
    (license license:gpl2)))

(define-public faust
  (package
    (name "faust")
    (version "0.9.90")
    (source (origin
              (method git-fetch)
              (uri (git-reference
                    (url "https://github.com/grame-cncm/faust")
                    (commit (string-append "v"
                                           (string-map (lambda (c)
                                                         (if (char=? c #\.) #\- c))
                                                       version)))))
              (file-name (string-append "faust-" version "-checkout"))
              (sha256
               (base32
                "0qc6iwjd3i80jdyjc186c6ywipmjzl8wlsp4050pbr56q4rlkd4z"))))
    (build-system gnu-build-system)
    (arguments
     `(#:make-flags (list (string-append "prefix=" (assoc-ref %outputs "out")))
       #:tests? #f
       #:phases
       (modify-phases %standard-phases
         ;; no "configure" script
         (delete 'configure)
         ;; Files appear under $out/share/faust that are read-only.  The
         ;; install phase tries to overwrite them and fails, so we change
         ;; the permissions first.
         (add-before 'install 'fix-permissions
           (lambda _
             (for-each (lambda (file)
                         (chmod file #o644))
                       (find-files "architecture/max-msp" ".*"))
             #t)))))
    (native-inputs
     `(("unzip" ,unzip)))
    (home-page "https://faust.grame.fr/")
    (synopsis "Signal processing language")
    (description
     "Faust is a programming language for realtime audio signal processing.")
    (license license:gpl2+)))

(define-public faust-2
  (package
    (inherit faust)
    (version "2.5.23")
    (source (origin
              (method url-fetch)
              (uri (string-append "https://github.com/grame-cncm/faust/"
                                  "releases/download/" version
                                  "/faust-" version ".tar.gz"))
              (sha256
               (base32
                "1yz5jnr76hh7rmxkpdi7gyrw1wp4gyqfpq8zyl97qdi5ga5gjznq"))))
    (build-system gnu-build-system)
    (arguments
     (substitute-keyword-arguments (package-arguments faust)
       ((#:make-flags flags)
        `(list (string-append "prefix=" (assoc-ref %outputs "out"))
               "world"))))
    (native-inputs
     `(("llvm" ,llvm-3.8)
       ("which" ,which)
       ("xxd" ,xxd)
       ("ctags" ,emacs-minimal)  ; for ctags
       ("pkg-config" ,pkg-config)))
    (inputs
     `(("libsndfile" ,libsndfile)
       ("libmicrohttpd" ,libmicrohttpd)
       ("ncurses" ,ncurses)
       ("openssl" ,openssl)
       ("zlib" ,zlib)))))

(define-public freepats
  (package
    (name "freepats")
    (version "20060219")
    (source (origin
              (method url-fetch)
              (uri (string-append "http://freepats.zenvoid.org/freepats-"
                                  version ".tar.bz2"))
              (sha256
               (base32
                "12iw36rd94zirll96cd5k0va7p5hxmf2shvjlhzihcmjaw8flq82"))))
    (build-system trivial-build-system)
    (arguments
     `(#:modules ((guix build utils))
       #:builder (begin
                   (use-modules (guix build utils))
                   (let ((out (string-append %output "/share/freepats")))
                     (setenv "PATH" (string-append
                                     (assoc-ref %build-inputs "bzip2") "/bin:"
                                     (assoc-ref %build-inputs "tar") "/bin"))
                     (invoke "tar" "xvf" (assoc-ref %build-inputs "source"))
                     (chdir "freepats")
                     ;; Use absolute pattern references
                     (substitute* "freepats.cfg"
                       (("Tone_000") (string-append out "/Tone_000"))
                       (("Drum_000") (string-append out "/Drum_000")))
                     (mkdir-p out)
                     (copy-recursively "." out)
                     #t))))
    (native-inputs
     `(("tar" ,tar)
       ("bzip2" ,bzip2)))
    (home-page "http://freepats.zenvoid.org")
    (synopsis "GUS compatible patches for MIDI players")
    (description
     "FreePats is a project to create a free and open set of GUS compatible
patches that can be used with softsynths such as Timidity and WildMidi.")
    ;; GPLv2+ with exception for compositions using these patches.
    (license license:gpl2+)))

(define-public guitarix
  (package
    (name "guitarix")
    (version "0.38.1")
    (source (origin
             (method url-fetch)
             (uri (string-append
                   "mirror://sourceforge/guitarix/guitarix/guitarix2-"
                   version ".tar.xz"))
             (sha256
              (base32
               "0bw7xnrx062nwb1bfj9x660h7069ncmz77szcs8icpqxrvhs7z80"))))
    (build-system waf-build-system)
    (arguments
     `(#:tests? #f ; no "check" target
       #:python ,python-2
       #:configure-flags
       (list
        ;; Add the output lib directory to the RUNPATH.
        (string-append "--ldflags=-Wl,-rpath=" %output "/lib"))
       #:phases
       (modify-phases %standard-phases
         (add-after 'unpack 'fix-boost-includes
           (lambda _
             (substitute* "src/headers/gx_internal_plugins.h"
               (("namespace gx_jack" m)
                (string-append "#include <boost/noncopyable.hpp>\n" m)))
             (substitute* '("src/headers/gx_system.h"
                            "src/headers/gx_parameter.h"
                            "src/headers/gx_json.h")
               (("namespace gx_system" m)
                (string-append "#include <boost/noncopyable.hpp>\n" m)))
             #t)))))
    (inputs
     `(("libsndfile" ,libsndfile)
       ("boost" ,boost)
       ("curl" ,curl)
       ("avahi" ,avahi)
       ("eigen" ,eigen)
       ("lv2" ,lv2)
       ("lilv" ,lilv)
       ("ladspa" ,ladspa)
       ("jack" ,jack-1)
       ("gtkmm" ,gtkmm-2)
       ("gtk+" ,gtk+-2)
       ("fftwf" ,fftwf)
       ("lrdf" ,lrdf)
       ("zita-resampler" ,zita-resampler)
       ("zita-convolver" ,zita-convolver)))
    (native-inputs
     `(("gperf" ,gperf)
       ("faust" ,faust)
       ("intltool" ,intltool)
       ("gettext" ,gettext-minimal)
       ("pkg-config" ,pkg-config)))
    (native-search-paths
     (list (search-path-specification
            (variable "LV2_PATH")
            (files '("lib/lv2")))))
    (home-page "https://guitarix.org/")
    (synopsis "Virtual guitar amplifier")
    (description "Guitarix is a virtual guitar amplifier running JACK.
Guitarix takes the signal from your guitar as a mono-signal from your sound
card.  The input is processed by a main amp and a rack-section.  Both can be
routed separately and deliver a processed stereo-signal via JACK.  You may
fill the rack with effects from more than 25 built-in modules including stuff
from a simple noise gate to modulation effects like flanger, phaser or
auto-wah.")
    (license license:gpl2+)))

(define-public guitarix-lv2
  (package (inherit guitarix)
    (name "guitarix-lv2")
    (arguments
     (substitute-keyword-arguments (package-arguments guitarix)
       ((#:configure-flags flags)
        `(cons "--no-standalone" ,flags))))))

(define-public rakarrack
  (package
    (name "rakarrack")
    (version "0.6.1")
    (source (origin
              (method url-fetch)
              (uri (string-append "mirror://sourceforge/rakarrack/rakarrack/"
                                  "rakarrack-" version "/rakarrack-"
                                  version ".tar.bz2"))
              (sha256
               (base32
                "1rpf63pdn54c4yg13k7cb1w1c7zsvl97c4qxcpz41c8l91xd55kn"))
              (modules '((guix build utils)))
              (snippet
               '(begin
                  (substitute* '("src/process.C"
                                 "src/global.h")
                    (("#include <Fl/") "#include <FL/"))
                  #t))))
    (build-system gnu-build-system)
    (inputs
     `(("alsa-utils" ,alsa-utils)
       ("fltk" ,fltk)
       ("libx11" ,libx11)
       ("libxext" ,libxext)
       ("libxfixes" ,libxfixes)
       ("libxft" ,libxft)
       ("libxrender" ,libxrender)
       ("libxpm" ,libxpm)
       ("fontconfig" ,fontconfig)
       ("freetype" ,freetype)
       ("jack" ,jack-1)
       ("alsa-lib" ,alsa-lib)
       ("libsndfile" ,libsndfile)
       ("libsamplerate" ,libsamplerate)
       ("zlib" ,zlib)))
    (home-page "http://rakarrack.sourceforge.net/")
    (synopsis "Audio effects processor")
    (description
     "Rakarrack is a richly featured multi-effects processor emulating a
guitar effects pedalboard.  Effects include compressor, expander, noise gate,
equalizers, exciter, flangers, chorus, various delay and reverb effects,
distortion modules and many more.  Most of the effects engine is built from
modules found in the excellent software synthesizer ZynAddSubFX.  Presets and
user interface are optimized for guitar, but Rakarrack processes signals in
stereo while it does not apply internal band-limiting filtering, and thus is
well suited to all musical instruments and vocals.")
    ;; The code is explicitly licensed under the GPL version 2 only.
    (license license:gpl2)))

(define-public ir
  (package
    (name "ir")
    (version "1.3.4")
    (source (origin
             (method git-fetch)
             (uri (git-reference
                   (url "https://github.com/tomszilagyi/ir.lv2")
                   (commit version)))
             (file-name (git-file-name name version))
             (sha256
              (base32
               "0svmjhg4r6wy5ci5rwz43ybll7yxjv7nnj7nyqscbzhr3gi5aib0"))))
    (build-system gnu-build-system)
    (arguments
     `(#:tests? #f                              ; no tests
       #:make-flags
       (list (string-append "PREFIX=" (assoc-ref %outputs "out"))
             (string-append "INSTDIR="
                            (assoc-ref %outputs "out") "/lib/lv2"))
       #:phases (modify-phases %standard-phases
                  (delete 'configure))))        ; no configure script
    (inputs
     `(("libsndfile" ,libsndfile)
       ("libsamplerate" ,libsamplerate)
       ("lv2" ,lv2)
       ("glib" ,glib)
       ("gtk+" ,gtk+-2)
       ("zita-convolver" ,zita-convolver)))
    (native-inputs
     `(("pkg-config" ,pkg-config)))
    (native-search-paths
     (list (search-path-specification
            (variable "LV2_PATH")
            (files '("lib/lv2")))))
    (home-page "https://tomszilagyi.github.io/plugins/ir.lv2")
    (synopsis "LV2 convolution reverb")
    (description
     "IR is a low-latency, real-time, high performance signal convolver
especially for creating reverb effects.  It supports impulse responses with 1,
2 or 4 channels, in any soundfile format supported by libsndfile.")
    (license license:gpl2+)))

(define-public jack-1
  (package
    (name "jack")
    (version "0.125.0")
    (source
     (origin
       (method url-fetch)
       ;; jackaudio.org/downloads/jack-audio-connection-kit-0.125.0.tar.gz
       ;; no longer exists (404).  Use an unofficial mirror.
       (uri (string-append "https://crux.ster.zone/downloads/"
                           "jack-audio-connection-kit/"
                           "jack-audio-connection-kit-" version ".tar.gz"))
       (sha256
        (base32 "0i6l25dmfk2ji2lrakqq9icnwjxklgcjzzk65dmsff91z2zva5rm"))))
    (build-system gnu-build-system)
    (arguments
     `(#:phases (modify-phases %standard-phases
                  (add-after 'unpack 'patch-configure
                    (lambda _
                      (substitute* "configure"
                        ;; Install to <out/lib> regardless of platform.
                        (("libnn=lib64") "libnn=lib"))
                      #t)))))
    (inputs
     `(("alsa-lib" ,alsa-lib)
       ("readline" ,readline)))
    ;; uuid.h is included in the JACK type headers
    ;; db.h is included in the libjack metadata headers
    (propagated-inputs
     `(("libuuid" ,util-linux "lib")
       ("bdb" ,bdb)))
    (native-inputs
     `(("pkg-config" ,pkg-config)))
    (home-page "https://jackaudio.org/")
    (synopsis "JACK audio connection kit")
    (description
     "JACK is a low-latency audio server.  It can connect a number of
different applications to an audio device, as well as allowing them to share
audio between themselves.  JACK is different from other audio server efforts
in that it has been designed from the ground up to be suitable for
professional audio work.  This means that it focuses on two key areas:
synchronous execution of all clients, and low latency operation.")
    ;; Most files are licensed under the GPL. However, the libjack/ tree is
    ;; licensed under the LGPL in order to allow for proprietary usage.
    (license (list license:gpl2+ license:lgpl2.1+))))

;; Packages depending on JACK should always prefer jack-1.  Both jack-1 and
;; jack-2 implement the same API.  JACK2 is provided primarily as a client
;; program for users who might benefit from the D-BUS features.
(define-public jack-2
  (package (inherit jack-1)
    (name "jack2")
    (version "1.9.13")
    (source (origin
             (method url-fetch)
             (uri (string-append "https://github.com/jackaudio/jack2/releases/"
                                 "download/v" version "/jack2-"
                                 version ".tar.gz"))
             (file-name (string-append name "-" version ".tar.gz"))
             (sha256
              (base32
               "1d1d403jn4366mqig6g8ghr8057b3rn7gs26b5p3rkal34j20qw2"))))
    (build-system waf-build-system)
    (arguments
     `(#:tests? #f  ; no check target
       #:configure-flags '("--dbus"
                           "--alsa")
       #:phases
       (modify-phases %standard-phases
         (add-before 'configure 'set-linkflags
           (lambda _
             ;; Add $libdir to the RUNPATH of all the binaries.
             (substitute* "wscript"
               ((".*CFLAGS.*-Wall.*" m)
                (string-append m
                               "    conf.env.append_unique('LINKFLAGS',"
                               "'-Wl,-rpath=" %output "/lib')\n")))
             #t))
         (add-after 'install 'wrap-python-scripts
           (lambda* (#:key inputs outputs #:allow-other-keys)
             ;; Make sure 'jack_control' runs with the correct PYTHONPATH.
             (let* ((out (assoc-ref outputs "out"))
                    (path (getenv "PYTHONPATH")))
               (wrap-program (string-append out "/bin/jack_control")
                 `("PYTHONPATH" ":" prefix (,path))))
             #t)))))
    (inputs
     `(("alsa-lib" ,alsa-lib)
       ("dbus" ,dbus)
       ("expat" ,expat)
       ("libsamplerate" ,libsamplerate)
       ("opus" ,opus)
       ("python-dbus" ,python-dbus)
       ("readline" ,readline)))
    (native-inputs
     `(("pkg-config" ,pkg-config)))
    ;; Most files are under GPLv2+, but some headers are under LGPLv2.1+
    (license (list license:gpl2+ license:lgpl2.1+))))

(define-public jalv
  (package
    (name "jalv")
    (version "1.6.4")
    (source (origin
              (method url-fetch)
              (uri (string-append "https://download.drobilla.net/jalv-"
                                  version ".tar.bz2"))
              (sha256
               (base32
                "1wwfn7yzbs37s2rdlfjgks63svd5g14yyzd2gdl7h0z12qncwsy2"))))
    (build-system waf-build-system)
    (arguments
     `(#:tests? #f                      ; no check target
       #:python ,python-2))
    (inputs
     `(("lv2" ,lv2)
       ("lilv" ,lilv)
       ("suil" ,suil)
       ("gtk2" ,gtk+-2)
       ("gtk3" ,gtk+)
       ("gtkmm" ,gtkmm-2)
       ("qtbase" ,qtbase)
       ("jack" ,jack-1)))
    (native-inputs
     `(("pkg-config" ,pkg-config)))
    (home-page "https://drobilla.net/software/jalv/")
    (synopsis "Simple LV2 host for JACK")
    (description
     "Jalv is a simple but fully featured LV2 host for JACK.  It runs LV2
plugins and exposes their ports as JACK ports, essentially making any LV2
plugin function as a JACK application.")
    (license license:isc)))

(define-public ladspa
  (package
    (name "ladspa")
    (version "1.13")
    (source
     (origin
       (method url-fetch)
       ;; Since the official link is dead,
       ;; we download the tarball from Debian or Internet Archive.
       (uri (list (string-append "http://http.debian.net"
                                 "/debian/pool/main/l/ladspa-sdk/ladspa-sdk_"
                                 version ".orig.tar.gz")
                  (string-append "https://web.archive.org/web/20140717172251/"
                                 "http://www.ladspa.org/download/ladspa_sdk_"
                                 version ".tgz")))
       (sha256
        (base32
         "0srh5n2l63354bc0srcrv58rzjkn4gv8qjqzg8dnq3rs4m7kzvdm"))))
    (build-system gnu-build-system)
    (arguments
     `(#:tests? #f  ; the "test" target is a listening test only
       #:phases
       (modify-phases %standard-phases
         (replace 'configure
           (lambda* (#:key inputs outputs #:allow-other-keys #:rest args)
             (chdir "src")
             (let ((out (assoc-ref outputs "out")))
               (substitute* "makefile"
                 (("/usr/lib/ladspa/") (string-append out "/lib/ladspa/"))
                 (("/usr/include/")    (string-append out "/include/"))
                 (("/usr/bin/")        (string-append out "/bin/"))
                 (("-mkdirhier")       "mkdir -p")
                 (("^CC.*")            "CC = gcc\n")
                 (("^CPP.*")           "CPP = g++\n")))
             #t))
         (delete 'build))))
    ;; Since the home page is gone, we provide a link to the archived version.
    (home-page
     "https://web.archive.org/web/20140729190945/http://www.ladspa.org/")
    (synopsis "Linux Audio Developer's Simple Plugin API (LADSPA)")
    (description
     "LADSPA is a standard that allows software audio processors and effects
to be plugged into a wide range of audio synthesis and recording packages.")
    (license license:lgpl2.1+)))

(define-public lash
  (package
    (name "lash")
    (version "0.6.0-rc2")
    (source (origin
              (method url-fetch)
              ;; The tilde is not permitted in the builder name, but is used
              ;; in the tarball.
              (uri (string-append
                    "mirror://savannah/lash/lash-"
                    (string-join (string-split version #\-) "~")
                    ".tar.bz2"))
              (file-name (string-append name "-" version ".tar.bz2"))
              (sha256
               (base32
                "12z1vx3krrzsfccpah9xjs68900xvr7bw92wx8np5871i2yv47iw"))))
    (build-system gnu-build-system)
    (arguments
     '(;; Glibc no longer includes Sun RPC support, so tell the build system
       ;; to use libtirpc instead.
       #:make-flags (list (string-append "CFLAGS=-I"
                                         (assoc-ref %build-inputs "libtirpc")
                                         "/include/tirpc -ltirpc"))
       #:phases
       (modify-phases %standard-phases
         ;; lashd embeds an ancient version of sigsegv so we just skip it
         (add-after 'unpack 'skip-lashd
           (lambda _
             (substitute* '("Makefile.am" "Makefile.in")
               (("lashd ") ""))
             #t)))
       #:configure-flags '("--disable-static")))
    (inputs
     `(("bdb" ,bdb)
       ("gtk" ,gtk+-2)
       ("jack" ,jack-1)
       ("libtirpc" ,libtirpc)
       ("readline" ,readline)
       ("python" ,python-2)))
    ;; According to pkg-config, packages depending on lash also need to have
    ;; at least the following packages declared as inputs.
    (propagated-inputs
     `(("alsa-lib" ,alsa-lib)
       ("dbus" ,dbus)
       ("libxml2" ,libxml2)))
    (native-inputs
     `(("pkg-config" ,pkg-config)))
    (home-page "https://www.nongnu.org/lash/")
    (synopsis "Audio application session manager")
    (description
     "LASH is a session management system for audio applications.  It allows
you to save and restore audio sessions consisting of multiple interconneced
applications, restoring program state (i.e. loaded patches) and the
connections between them.")
    (license license:gpl2+)))

(define-public libbs2b
  (package
    (name "libbs2b")
    (version "3.1.0")
    (source (origin
              (method url-fetch)
              (uri (string-append "mirror://sourceforge/bs2b/libbs2b/" version
                                  "/libbs2b-" version ".tar.lzma"))
              (sha256
               (base32
                "1mcc4gjkmphczjybnsrip3gq1f974knzys7x49bv197xk3fn8wdr"))))
    (build-system gnu-build-system)
    (native-inputs `(("pkg-config" ,pkg-config)))
    (inputs `(("libsndfile" ,libsndfile)))
    (home-page "https://sourceforge.net/projects/bs2b/")
    (synopsis "Bauer stereophonic-to-binaural DSP")
    (description
     "The Bauer stereophonic-to-binaural DSP (bs2b) library and plugins is
designed to improve headphone listening of stereo audio records.  Recommended
for headphone prolonged listening to disable superstereo fatigue without
essential distortions.")
    (license license:expat)))

(define-public ladspa-bs2b
  (package
    (name "ladspa-bs2b")
    (version "0.9.1")
    (source (origin
              (method url-fetch)
              (uri (string-append
                    "mirror://sourceforge/bs2b/plugins/LADSPA%20plugin/"
                    version "/" name "-" version ".tar.gz"))
              (sha256
               (base32
                "1b4aipbj1ba5k99gbc7gmgy14sywyrjd8rpyqj5l905j0mjv8jg2"))))
    (build-system gnu-build-system)
    (native-inputs `(("pkg-config" ,pkg-config)))
    (inputs `(("ladspa" ,ladspa)
              ("libbs2b" ,libbs2b)))
    (home-page "https://sourceforge.net/projects/bs2b/")
    (synopsis "Bauer stereophonic-to-binaural DSP - LADSPA plugin")
    (description "The Bauer stereophonic-to-binaural DSP (bs2b) library and
plugins is designed to improve headphone listening of stereo audio records.
Recommended for headphone prolonged listening to disable superstereo fatigue
without essential distortions.  This package contains a LADSPA plugin for use
with applications that support them (e.g. PulseAudio).")
    (license license:gpl2+)))

(define-public liblo
  (package
    (name "liblo")
    (version "0.31")
    (source (origin
             (method url-fetch)
             (uri (string-append "mirror://sourceforge/liblo/liblo/" version
                                 "/liblo-" version ".tar.gz"))
             (sha256
              (base32
               "0l67rkdhfa8cffa0nynql3lh2xlbn1454h6qxhjddp1029p48krb"))))
    (build-system gnu-build-system)
    (arguments
     `(;; liblo test FAILED
       ;; liblo server error 19 in setsockopt(IP_ADD_MEMBERSHIP): No such device
       #:tests? #f))
    (home-page "http://liblo.sourceforge.net")
    (synopsis "Implementation of the Open Sound Control protocol")
    (description
     "liblo is a lightweight library that provides an easy to use
implementation of the Open Sound Control (@dfn{OSC}) protocol.")
    (license license:lgpl2.1+)))

(define-public python-pyaudio
  (package
    (name "python-pyaudio")
    (version "0.2.11")
    (source
     (origin
       (method url-fetch)
       (uri (pypi-uri "PyAudio" version))
       (sha256
        (base32
         "0x7vdsigm7xgvyg3shd3lj113m8zqj2pxmrgdyj66kmnw0qdxgwk"))))
    (build-system python-build-system)
    (inputs
     `(("portaudio" ,portaudio)))
    (home-page "https://people.csail.mit.edu/hubert/pyaudio/")
    (synopsis "Bindings for PortAudio v19")
    (description "This package provides bindings for PortAudio v19, the
cross-platform audio input/output stream library.")
    (license license:expat)))

(define-public python2-pyaudio
  (package-with-python2 python-pyaudio))

(define-public python-pyliblo
  (package
    (name "python-pyliblo")
    (version "0.10.0")
    (source (origin
             (method url-fetch)
             (uri (string-append "http://das.nasophon.de/download/pyliblo-"
                                 version ".tar.gz"))
             (sha256
              (base32
               "13vry6xhxm7adnbyj28w1kpwrh0kf7nw83cz1yq74wl21faz2rzw"))))
    (build-system python-build-system)
    (arguments `(#:tests? #f)) ;no tests
    (native-inputs
     `(("python-cython" ,python-cython)))
    (inputs
     `(("liblo" ,liblo)))
    (home-page "http://das.nasophon.de/pyliblo/")
    (synopsis "Python bindings for liblo")
    (description
     "Pyliblo is a Python wrapper for the liblo Open Sound Control (OSC)
library.  It supports almost the complete functionality of liblo, allowing you
to send and receive OSC messages using a nice and simple Python API.  Also
included are the command line utilities @code{send_osc} and @code{dump_osc}.")
    (license license:lgpl2.1+)))

(define-public python2-pyliblo
  (package-with-python2 python-pyliblo))

(define-public lilv
  (package
    (name "lilv")
    (version "0.24.8")
    (source (origin
             (method url-fetch)
             (uri (string-append "https://download.drobilla.net/lilv-"
                                 version ".tar.bz2"))
             (sha256
              (base32
               "0063i5zgf3d3accwmyx651hw0wh5ik7kji2hvfkcdbl1qia3dp6a"))))
    (build-system waf-build-system)
    (arguments
     `(#:tests? #f                      ; no check target
       #:phases
       (modify-phases %standard-phases
         (add-before 'configure 'set-ldflags
          (lambda* (#:key outputs #:allow-other-keys)
            (setenv "LDFLAGS"
                    (string-append "-Wl,-rpath="
                                   (assoc-ref outputs "out") "/lib"))
            #t))
         (add-after 'unpack 'full-store-path-to-shared-library
           (lambda* (#:key outputs #:allow-other-keys)
             (with-directory-excursion "bindings/python"
               (substitute* "lilv.py"
                 (("liblilv-0.so") (string-append (assoc-ref outputs "out")
                                                  "/lib/liblilv-0.so"))))
             #t)))))
    ;; Required by lilv-0.pc.
    (propagated-inputs
     `(("lv2" ,lv2)
       ("serd" ,serd)
       ("sord" ,sord)
       ("sratom" ,sratom)))
    (native-inputs
     `(("python" ,python)
       ("pkg-config" ,pkg-config)))
    (home-page "https://drobilla.net/software/lilv")
    (synopsis "Library to simplify use of LV2 plugins in applications")
    (description
     "Lilv is a C library to make the use of LV2 plugins as simple as possible
for applications.  Lilv is the successor to SLV2, rewritten to be
significantly faster and have minimal dependencies.")
    (license license:isc)))

(define-public lv2
  (package
    (name "lv2")
    (version "1.18.0")
    (source (origin
             (method url-fetch)
             (uri (string-append "https://lv2plug.in/spec/lv2-"
                                 version ".tar.bz2"))
             (sha256
              (base32
               "0gs7401xz23q9vajqr31aa2db8dvssgyh5zrvr4ipa6wig7yb8wh"))))
    (build-system waf-build-system)
    (arguments
     `(#:tests? #f                      ; no check target
       #:configure-flags '("--no-plugins")))
    (inputs
     ;; Leaving off cairo and gtk+-2.0 which are needed for example plugins
     `(("libsndfile" ,libsndfile)))
    (native-inputs
     `(("pkg-config" ,pkg-config)))
    (home-page "https://lv2plug.in/")
    (synopsis "LV2 audio plugin specification")
    (description
     "LV2 is an open specification for audio plugins and host applications.
At its core, LV2 is a simple stable interface, accompanied by extensions which
add functionality to support the needs of increasingly powerful audio
software.")
    (license license:isc)))

(define-public lv2-mda-piano
  (package
    (name "lv2-mda-piano")
    (version "0.0.2")
    (source (origin
              (method git-fetch)
              (uri (git-reference
                    (url "http://git.elephly.net/software/lv2-mdametapiano.git")
                    (commit version)))
              (file-name (git-file-name name version))
              (sha256
               (base32
                "07lywf6lpfpndg3i9w752mmlg2hgn1bwp23h8b0mdj6awh67abqd"))))
    (build-system gnu-build-system)
    (arguments
     `(#:make-flags (list
                     "TYPE=mdaPiano"
                     (string-append "PREFIX=" (assoc-ref %outputs "out")))
       #:tests? #f ; no check target
       #:phases (modify-phases %standard-phases (delete 'configure))))
    (inputs
     `(("lv2" ,lv2)
       ("lvtk" ,lvtk)))
    (native-inputs
     `(("pkg-config" ,pkg-config)))
    (native-search-paths
     (list (search-path-specification
            (variable "LV2_PATH")
            (files '("lib/lv2")))))
    (home-page "https://elephly.net/lv2/mdapiano.html")
    (synopsis "LV2 port of the mda Piano plugin")
    (description "An LV2 port of the mda Piano VSTi.")
    (license license:gpl3+)))

(define-public lv2-mda-epiano
  (package (inherit lv2-mda-piano)
    (name "lv2-mda-epiano")
    (arguments
     `(#:make-flags (list
                     "TYPE=mdaEPiano"
                     (string-append "PREFIX=" (assoc-ref %outputs "out")))
       #:tests? #f ; no check target
       #:phases (modify-phases %standard-phases (delete 'configure))))
    (home-page "https://elephly.net/lv2/mdaepiano.html")
    (synopsis "LV2 port of the mda EPiano plugin")
    (description "An LV2 port of the mda EPiano VSTi.")))

(define-public lvtk
  (package
    (name "lvtk")
    (version "1.2.0")
    (source (origin
             (method git-fetch)
             (uri (git-reference
                   (url "https://github.com/lvtk/lvtk")
                   (commit version)))
             (file-name (git-file-name name version))
             (sha256
              (base32
               "1b01zvzl70ana6l1kn8fgyr7msnn3c7x61cgw7fdpp50322352p8"))))
    (build-system waf-build-system)
    (arguments
     `(#:tests? #f  ; no check target
       #:python ,python-2
       #:configure-flags
       (list (string-append "--boost-includes="
                            (assoc-ref %build-inputs "boost")
                            "/include"))))
    (inputs
     `(("boost" ,boost)
       ("gtkmm" ,gtkmm-2)
       ("lv2" ,lv2)))
    (native-inputs
     `(("pkg-config" ,pkg-config)))
    (home-page "https://github.com/lvtk/lvtk")
    (synopsis "C++ libraries for LV2 plugins")
    (description
     "The LV2 Toolkit (LVTK) contains libraries that wrap the LV2 C API and
extensions into easy to use C++ classes.  It is the successor of
lv2-c++-tools.")
    (license license:gpl3+)))

(define-public openal
  (package
    (name "openal")
    (version "1.20.1")
    (source (origin
              (method url-fetch)
              (uri (string-append
                    "https://openal-soft.org/openal-releases/openal-soft-"
                    version ".tar.bz2"))
              (sha256
               (base32
                "0vax0b1lgd4212bpxa1rciz52d4mv3dkfvcbbhzw4cjp698v1kmn"))))
    (build-system cmake-build-system)
    (arguments
     `(#:tests? #f  ; no check target
       #:phases
       (modify-phases %standard-phases
         (add-after
          'unpack 'use-full-library-paths
          (lambda* (#:key inputs #:allow-other-keys)
            (substitute* "alc/backends/pulseaudio.cpp"
              (("#define PALIB \"libpulse\\.so\\.0\"")
               (string-append "#define PALIB \""
                              (assoc-ref inputs "pulseaudio")
                              "/lib/libpulse.so.0"
                              "\"")))
            (substitute* "alc/backends/alsa.cpp"
              (("LoadLib\\(\"libasound\\.so\\.2\"\\)")
               (string-append "LoadLib(\""
                              (assoc-ref inputs "alsa-lib")
                              "/lib/libasound.so.2"
                              "\")")))
            #t)))))
    (inputs
     `(("alsa-lib" ,alsa-lib)
       ("pulseaudio" ,pulseaudio)))
    (synopsis "3D audio API")
    (description
     "OpenAL provides capabilities for playing audio in a virtual 3D
environment.  Distance attenuation, doppler shift, and directional sound
emitters are among the features handled by the API.  More advanced effects,
including air absorption, occlusion, and environmental reverb, are available
through the EFX extension.  It also facilitates streaming audio, multi-channel
buffers, and audio capture.")
    (home-page "https://openal-soft.org/")
    (license license:lgpl2.0+)))

(define-public freealut
  (package
    (name "freealut")
    (version "1.1.0")
    (source (origin
              (method url-fetch)
              ;; Upstream url is unclear, many systems use Fedora, there is also
              ;; https://github.com/vancegroup/freealut though the status of it
              ;; (official? unofficial?) is not clear.
              (uri (string-append
                    "https://pkgs.fedoraproject.org/repo/pkgs/" name "/" name "-"
                    version ".tar.gz" "/e089b28a0267faabdb6c079ee173664a/" name
                    "-" version ".tar.gz"))
              (sha256
               (base32
                "0kzlil6112x2429nw6mycmif8y6bxr2cwjcvp18vh6s7g63ymlb0"))))
    (build-system cmake-build-system)
    (arguments
     `(#:tests? #f))  ; no check target
    (inputs
     `(("openal" ,openal)))
    (synopsis "Free implementation of OpenAL's ALUT standard")
    (description "freealut is the OpenAL Utility Toolkit.")
    (home-page "https://kcat.strangesoft.net/openal.html")
    (license license:lgpl2.0)))

(define-public patchage
  (package
    (name "patchage")
    (version "1.0.2")
    (source (origin
              (method url-fetch)
              (uri (string-append "https://download.drobilla.net/patchage-"
                                  version
                                  ".tar.bz2"))
              (sha256
               (base32
                "0dk3fiac10m83mwss3026yz7ygc47c2iw924cwwnh2fyydc9bsy6"))))
    (build-system waf-build-system)
    (arguments
     `(#:tests? #f                      ; no check target
       #:python ,python-2))
    (inputs
     `(("alsa-lib" ,alsa-lib)
       ("boost" ,boost)
       ("jack" ,jack-1)
       ("ganv" ,ganv)
       ("glibmm" ,glibmm)
       ("gtkmm" ,gtkmm-2)
       ("dbus-glib" ,dbus-glib)))
    (native-inputs
     `(("pkg-config" ,pkg-config)))
    (home-page "https://drobilla.net/software/patchage/")
    (synopsis "Modular patch bay for audio and MIDI systems")
    (description
     "Patchage is a modular patch bay for audio and MIDI systems based on JACK
and ALSA.")
    (license license:gpl3+)))

(define-public pcaudiolib
  (package
    (name "pcaudiolib")
    (version "1.1")
    (home-page "https://github.com/espeak-ng/pcaudiolib")
    (source (origin
              (method git-fetch)
              (uri (git-reference (url home-page) (commit version)))
              (file-name (git-file-name name version))
              (sha256
               (base32
                "0c55hlqqh0m7bcb3nlgv1s4a22s5bgczr1cakjh3767rjb10khi0"))))
    (build-system gnu-build-system)
    (arguments
     `(#:configure-flags '("--disable-static")))
    (native-inputs
     `(("autoconf" ,autoconf)
       ("automake" ,automake)
       ("libtool" ,libtool)
       ("pkg-config" ,pkg-config)
       ("which" ,which)))
    (inputs
     `(("alsa-lib" ,alsa-lib)
       ("pulseaudio" ,pulseaudio)))
    (synopsis "Portable C audio library")
    (description
     "The Portable C Audio Library (pcaudiolib) provides a C@tie{}API to
different audio devices such as ALSA or PulseAudio.")
    (license (list license:gpl3+
                   ;; The bundled TPCircularBuffer uses a custom license.
                   (license:non-copyleft
                    "file://src/TPCircularBuffer/README.markdown")))))

(define-public qjackctl
  (package
    (name "qjackctl")
    (version "0.5.9")
    (source (origin
              (method url-fetch)
              (uri (string-append "mirror://sourceforge/qjackctl/qjackctl/"
                                  version "/qjackctl-" version ".tar.gz"))
              (sha256
               (base32
                "1saywsda9m124rmjp7i3n0llryaliabjxhqhvqr6dm983qy7pypk"))))
    (build-system gnu-build-system)
    (arguments
     '(#:tests? #f))                    ; no check target
    (inputs
     `(("jack" ,jack-1)
       ("alsa-lib" ,alsa-lib)
       ("qtbase" ,qtbase)
       ("qtx11extras" ,qtx11extras)))
    (native-inputs
     `(("pkg-config" ,pkg-config)
       ("qttools" ,qttools)))
    (home-page "https://qjackctl.sourceforge.io/")
    (synopsis "Jack server control application")
    (description "Control a Jack server.  Allows you to plug various sources
into various outputs and to start, stop and configure jackd")
    (license license:gpl2+)))

(define-public qjackrcd
  (package
    (name "qjackrcd")
    (version "1.2.2")
    (source (origin
              (method git-fetch)
              (uri (git-reference
                    (url "https://github.com/orouits/qjackrcd")
                    (commit (string-append "v" version))))
              (file-name (git-file-name name version))
              (sha256
               (base32
                "1l5iq2mkqd4gn9yr8xbh9qlpp1clcflazychl4vhdbz0bzq4c6al"))))
    (build-system gnu-build-system)
    (arguments
     `(#:phases
       (modify-phases %standard-phases
         (replace 'configure
           (lambda* (#:key outputs #:allow-other-keys)
             (invoke "qmake"
                     (string-append "PREFIX="
                                    (assoc-ref outputs "out"))))))))
    (native-inputs
     `(("qtbase" ,qtbase))) ; for qmake
    (inputs
     `(("jack" ,jack-1)
       ("libsndfile" ,libsndfile)
       ("qtbase" ,qtbase)))
    (home-page "https://sourceforge.net/projects/qjackrcd/")
    (synopsis "Stereo audio recorder for JACK")
    (description "QJackRcd is a simple graphical stereo recorder for JACK
supporting silence processing for automatic pause, file splitting, and
background file post-processing.")
    (license license:gpl2+)))

(define-public supercollider
  (package
    (name "supercollider")
    (version "3.11.0")
    (source (origin
              (method git-fetch)
              (uri (git-reference
                    (url "https://github.com/supercollider/supercollider")
                    (commit (string-append "Version-" version))
                    ;; for nova-simd, nova-tt, hidapi, TLSF, oscpack
                    (recursive? #t)))
              (file-name (git-file-name name version))
              (sha256
               (base32
                "02v911w2kdbg3kfl593lb2ig4sjbfxzv20a0vbcymhfzpvp1x6xp"))
              (modules '((guix build utils)
                         (ice-9 ftw)))
              (snippet
               ;; The build system doesn't allow us to unbundle the following
               ;; libraries.  hidapi is also heavily patched and upstream not
               ;; actively maintained.
               '(let ((keep-dirs '("nova-simd" "nova-tt" "hidapi"
                                   "TLSF-2.4.6" "oscpack_1_1_0" "." "..")))
                  (with-directory-excursion "./external_libraries"
                    (for-each
                     delete-file-recursively
                     (scandir "."
                              (lambda (x)
                                (and (eq? (stat:type (stat x)) 'directory)
                                     (not (member (basename x) keep-dirs)))))))
                  ;; To find the Guix provided ableton-link library.
                  (substitute* "lang/CMakeLists.txt"
                    (("include\\(\\.\\./external_libraries/link/\
AbletonLinkConfig\\.cmake\\)")
                     "find_package(AbletonLink NAMES AbletonLink ableton-link \
link REQUIRED)"))
                  #t))))
    (build-system cmake-build-system)
    (outputs
     '("out"   ;core language
       "ide")) ;qt ide
    (arguments
     `(#:configure-flags '("-DSYSTEM_BOOST=on" "-DSYSTEM_YAMLCPP=on"
                           "-DSC_QT=ON" "-DCMAKE_BUILD_TYPE=Release"
                           "-DFORTIFY=ON" "-DLIBSCSYNTH=ON"
                           "-DSC_EL=off") ;scel is packaged individually as
                                          ;emacs-scel
       #:phases
       (modify-phases %standard-phases
         ;; HOME must be defined otherwise supercollider throws a "ERROR:
         ;; Primitive '_FileMkDir' failed." error when generating the doc.
         ;; The graphical tests also hang without it.
         (add-after 'unpack 'set-home-directory
           (lambda _
             (setenv "HOME" (getcwd))
             #t))
         (add-after 'unpack 'patch-scclass-dir
           (lambda* (#:key outputs #:allow-other-keys)
             (let* ((out (assoc-ref outputs "out"))
                    (scclass-dir
                     (string-append out
                                    "/share/SuperCollider/SCClassLibrary")))
               (substitute* "lang/LangSource/SC_LanguageConfig.cpp"
                 (((string-append
                    "SC_Filesystem::instance\\(\\)\\.getDirectory"
                    "\\(DirName::Resource\\) / CLASS_LIB_DIR_NAME"))
                  (string-append "Path(\"" scclass-dir "\")")))
               #t)))
         (add-before 'build 'prepare-x
           (lambda _
             (system "Xvfb &")
             (setenv "DISPLAY" ":0")
             #t))
         (add-before 'install 'install-ide
           (lambda* (#:key outputs #:allow-other-keys)
             (let* ((out (assoc-ref outputs "out"))
                    (ide (assoc-ref outputs "ide"))
                    (scide "editors/sc-ide/scide"))
               (install-file scide
                             (string-append ide "/bin"))
               (delete-file scide)
               #t))))))
    (native-inputs
     `(("ableton-link" ,ableton-link)
       ("pkg-config" ,pkg-config)
       ("qttools" ,qttools)
       ("xorg-server" ,xorg-server-for-tests)))
    (inputs
     `(("jack" ,jack-1)
       ("libsndfile" ,libsndfile)
       ("fftw" ,fftw)
       ("libxt" ,libxt)
       ("readline" ,readline)           ;readline support for sclang's CLI
       ("alsa" ,alsa-lib)               ;for sclang's MIDI interface
       ("eudev" ,eudev)                 ;for user interactions with devices
       ("avahi" ,avahi)                 ;zeroconf service discovery support
       ("icu4c" ,icu4c)
       ("boost" ,boost)
       ("boost-sync" ,boost-sync)
       ("yaml-cpp" ,yaml-cpp)
       ("qtbase" ,qtbase)
       ("qtdeclarative" ,qtdeclarative)
       ("qtsvg" ,qtsvg)
       ("qtwebchannel" ,qtwebchannel)
       ("qtwebsockets" ,qtwebsockets)))
    (propagated-inputs                  ;to get native-search-path
     `(("qtwebengine" ,qtwebengine)))
    (home-page "https://github.com/supercollider/supercollider")
    (synopsis "Synthesis engine and programming language")
    (description "SuperCollider is a synthesis engine (@code{scsynth} or
@code{supernova}) and programming language (@code{sclang}).  It can be used
for experimenting with sound synthesis and algorithmic composition.

SuperCollider requires jackd to be installed in your user profile and your
user must be allowed to access the realtime features of the kernel.  Search
for \"realtime\" in the index of the Guix manual to learn how to achieve this
using Guix System.")
    (license license:gpl2+)))

(define-public raul
  (package
    (name "raul")
    (version "0.8.0")
    (source (origin
              (method url-fetch)
              (uri (string-append "https://download.drobilla.net/raul-"
                                  version ".tar.bz2"))
              (sha256
               (base32
                "09ms40xc1x6qli6lxkwn5ibqh62nl9w7dq0b6jh1q2zvnrxwsd8b"))))
    (build-system waf-build-system)
    (arguments
     `(#:python ,python-2
       #:tests? #f)) ; no check target
    (inputs
     `(("glib" ,glib)
       ("boost" ,boost)))
    (native-inputs
     `(("pkg-config" ,pkg-config)))
    (home-page "https://drobilla.net/software/raul/")
    (synopsis "Real-time audio utility library")
    (description
     "Raul (Real-time Audio Utility Library) is a C++ utility library primarily
aimed at audio/musical applications.")
    (license license:gpl2+)))

(define-public raul-devel
  (let ((commit "4db870b2b20b0a608ec0283139056b836c5b1624")
        (revision "1"))
    (package (inherit raul)
      (name "raul")
      (version (string-append "0.8.9-" revision "."
                              (string-take commit 9)))
      (source (origin
                (method git-fetch)
                (uri (git-reference
                      (url "https://git.drobilla.net/raul.git")
                      (commit commit)))
                (file-name (string-append name "-" version "-checkout"))
                (sha256
                 (base32
                  "04fajrass3ymr72flx5js5vxc601ccrmx8ny8scp0rw7j0igyjdr")))))))

(define-public resample
  (package
    (name "resample")
    (version "1.8.1")
    (source (origin
              (method url-fetch)
              (uri (string-append "https://ccrma.stanford.edu/~jos/gz/resample-"
                                  version
                                  ".tar.gz"))
              (sha256 (base32
                       "074zj8ydp05yy1hjcglfv3hkvj4cm50f9nralka1992pm6yf8yvy"))))
    (build-system gnu-build-system)
    (native-inputs
     `(("autoconf" ,autoconf)
       ("automake" ,automake)
       ("pkg-config" ,pkg-config)
       ("libtool" ,libtool)))
    (synopsis "Sampling rate conversion and filter design utilities")
    (description "This package contains the @command{resample} and
@command{windowfilter} command line utilities.  The @command{resample} command
allows changing the sampling rate of a sound file, while the
@command{windowfilter} command allows to design Finite Impulse Response (FIR)
filters using the so-called @emph{window method}.")
    (home-page "https://ccrma.stanford.edu/~jos/resample/Free_Resampling_Software.html")
    (license license:lgpl2.1+)))

(define-public rubberband
  (package
    (name "rubberband")
    (version "1.8.2")
    (source (origin
              (method url-fetch)
              (uri
               (string-append "https://bitbucket.org/breakfastquay/rubberband/get/v"
                              version
                              ".tar.bz2"))
              (file-name (string-append name "-" version ".tar.bz2"))
              (sha256
               (base32
                "0462fmjnfqpv2qi0s6ny42drqarkr0xy9lw8frjmfgzyzl5n9294"))))
    (build-system gnu-build-system)
    (arguments
     `(#:tests? #f                      ; no check target
       #:phases
       (modify-phases %standard-phases
         (add-after 'unpack 'skip-jni-installation
           ;; ‘make install’ unconditionally installs librubberband-jni.so,
           ;; which is never built by ‘make all’.  Skip it.
           (lambda _
             (substitute* "Makefile.in"
               ((".*cp -f \\$\\(JNI_TARGET\\).*") ""))
             #t)))))
    (inputs
     `(("ladspa" ,ladspa)
       ("libsamplerate" ,libsamplerate)
       ("vamp" ,vamp)))
    (native-inputs
     `(("pkg-config" ,pkg-config)))
    (home-page "https://breakfastquay.com/rubberband/")
    (synopsis "Audio time-stretching and pitch-shifting library")
    (description
     "Rubber Band is a library and utility program that permits changing the
tempo and pitch of an audio recording independently of one another.")
    (license license:gpl2+)))

(define-public rtmidi
  (package
    (name "rtmidi")
    (version "4.0.0")
    (source (origin
              (method url-fetch)
              (uri (string-append "https://www.music.mcgill.ca/~gary/rtmidi"
                                  "/release/rtmidi-" version ".tar.gz"))
              (file-name (string-append "rtmidi-" version ".tar.gz"))
              (sha256
               (base32
                "1k962ljpnwyjw9jjiky2372khhri1wqvrj5qsalfpys31xqzw31p"))))
    (build-system gnu-build-system)
    (inputs
     `(("jack" ,jack-1)
       ("alsa-lib" ,alsa-lib)))
    (native-inputs
     `(("autoconf" ,autoconf)
       ("automake" ,automake)
       ("libtool" ,libtool)
       ("pkg-config" ,pkg-config)))
    (home-page "https://www.music.mcgill.ca/~gary/rtmidi")
    (synopsis "Cross-platform MIDI library for C++")
    (description
     "RtMidi is a set of C++ classes (RtMidiIn, RtMidiOut, and API specific
classes) that provide a common cross-platform API for realtime MIDI
input/output.")
    (license license:expat)))

(define-public sratom
  (package
    (name "sratom")
    (version "0.6.4")
    (source (origin
              (method url-fetch)
              (uri (string-append "https://download.drobilla.net/sratom-"
                                  version ".tar.bz2"))
              (sha256
               (base32
                "0vh0biy3ngpzzgdml309c2mqz8xq9q0hlblczb4c6alhp0a8yv0l"))))
    (build-system waf-build-system)
    (arguments `(#:tests? #f))          ;no check target
    (propagated-inputs
     ;; In Requires of sratom-0.pc.
     `(("lv2" ,lv2)
       ("serd" ,serd)
       ("sord" ,sord)))
    (native-inputs
     `(("pkg-config" ,pkg-config)))
    (home-page "https://drobilla.net/software/sratom/")
    (synopsis "Library for serialising LV2 atoms to/from RDF")
    (description
     "Sratom is a library for serialising LV2 atoms to/from RDF, particularly
the Turtle syntax.")
    (license license:isc)))

(define-public suil
  (package
    (name "suil")
    (version "0.10.6")
    (source (origin
              (method url-fetch)
              (uri (string-append "https://download.drobilla.net/suil-"
                                  version ".tar.bz2"))
              (sha256
               (base32
                "0z4v01pjw4wh65x38w6icn28wdwxz13ayl8hvn4p1g9kmamp1z06"))))
    (build-system waf-build-system)
    (arguments
     `(#:tests? #f))                    ;no check target
    (inputs
     `(("lv2" ,lv2)
       ("gtk+" ,gtk+-2)
       ("gtk+" ,gtk+)
       ("qt" ,qtbase)))
    (native-inputs
     `(("pkg-config" ,pkg-config)))
    (home-page "https://drobilla.net/software/suil/")
    (synopsis "Library for loading and wrapping LV2 plugin UIs")
    (description
     "Suil is a lightweight C library for loading and wrapping LV2 plugin UIs.

Suil makes it possible to load a UI of a toolkit in a host using another
toolkit.  The API is designed such that hosts do not need to explicitly
support specific toolkits – if Suil supports a particular toolkit, then UIs in
that toolkit will work in all hosts that use Suil automatically.

Suil currently supports every combination of Gtk, Qt, and X11.")
    (license license:isc)))

(define-public timidity++
  (package
    (name "timidity++")
    (version "2.14.0")
    (source (origin
              (method url-fetch)
              (uri (string-append "mirror://sourceforge/timidity/TiMidity++"
                                  "/TiMidity++-" version
                                  "/TiMidity++-" version ".tar.bz2"))
              (sha256
               (base32
                "0xk41w4qbk23z1fvqdyfblbz10mmxsllw0svxzjw5sa9y11vczzr"))))
    (build-system gnu-build-system)
    (arguments
     '(#:configure-flags
       (list "--enable-audio=alsa,flac,jack,ao,vorbis,speex"
             "--enable-ncurses"
             "--enable-server"
             "--enable-alsaseq"
             (string-append "--with-default-path="
                            (assoc-ref %outputs "out") "/etc/timidity"))
       #:phases
       (modify-phases %standard-phases
         (add-after 'install 'install-config
           (lambda _
             (let ((out (string-append (assoc-ref %outputs "out")
                                       "/etc/timidity")))
               (mkdir-p out)
               (call-with-output-file
                   (string-append out "/timidity.cfg")
                 (lambda (port)
                   (format port (string-append "source "
                                               (assoc-ref %build-inputs "freepats")
                                               "/share/freepats/freepats.cfg")))))
             #t)))))
    (inputs
     `(("alsa-lib" ,alsa-lib)
       ("ao" ,ao)
       ("flac" ,flac)
       ("jack" ,jack-1)
       ("libogg" ,libogg)
       ("libvorbis" ,libvorbis)
       ("speex" ,speex)
       ("ncurses" ,ncurses)
       ("freepats" ,freepats)))
    (native-inputs
     `(("pkg-config" ,pkg-config)))
    (home-page "http://timidity.sourceforge.net/")
    (synopsis "Software synthesizer for playing MIDI files")
    (description
     "TiMidity++ is a software synthesizer.  It can play MIDI files by
converting them into PCM waveform data; give it a MIDI data along with digital
instrument data files, then it synthesizes them in real-time, and plays.  It
can not only play sounds, but also can save the generated waveforms into hard
disks as various audio file formats.")
    (license license:gpl2+)))

(define-public vamp
  (package
    (name "vamp")
    (version "2.6")
    (source (origin
              (method url-fetch)
              (uri (string-append
                    "https://code.soundsoftware.ac.uk"
                    "/attachments/download/1520/vamp-plugin-sdk-"
                    version ".tar.gz"))
              (sha256
               (base32
                "0pzq0yy2kdl3jgfc2aqmh5m55nk1ild0hq8mydiiw35c6y0mglyh"))))
    (build-system gnu-build-system)
    (arguments
     `(#:tests? #f                      ; no check target
       #:phases
       (modify-phases %standard-phases
         (add-after 'install 'remove-libvamp-hostsdk.la
           (lambda* (#:key outputs #:allow-other-keys)
             ;; https://bugs.launchpad.net/ubuntu/+source/vamp-plugin-sdk/+bug/1253656
             (for-each delete-file
                       (let ((out (assoc-ref outputs "out")))
                         (list (string-append out "/lib/libvamp-sdk.la")
                               (string-append out "/lib/libvamp-hostsdk.la"))))
             #t)))))
    (inputs
     `(("libsndfile" ,libsndfile)))
    (native-inputs
     `(("pkg-config" ,pkg-config)))
    (home-page "https://vamp-plugins.org")
    (synopsis "Modular and extensible audio processing system")
    (description
     "Vamp is an audio processing plugin system for plugins that extract
descriptive information from audio data — typically referred to as audio
analysis plugins or audio feature extraction plugins.")
    (license
     (license:x11-style
      "https://code.soundsoftware.ac.uk/projects/vamp-plugin-sdk/repository/entry/COPYING"))))

(define-public libsbsms
  (package
    (name "libsbsms")
    (version "2.0.2")
    (source
     (origin
       (method url-fetch)
       (uri (string-append "mirror://sourceforge/sbsms/sbsms/" version
                           "/libsbsms-" version ".tar.gz"))
       (sha256
        (base32 "1vmf84iy4dkwxv887grnlsfk43fmhd9gbg26gc2kgcv40sbkvayf"))))
    (build-system gnu-build-system)
    (native-inputs `(("automake" ,automake)))
    (arguments
     `(#:configure-flags
       ;; Disable the use of SSE unless on x86_64.
       ,(if (not (string-prefix? "x86_64" (or (%current-target-system)
                                              (%current-system))))
            ''("--disable-sse")
            ''())
       #:phases
       (modify-phases %standard-phases
         (add-after
          'unpack 'fix-ar-lib-path
          (lambda* (#:key inputs #:allow-other-keys)
            ;; Originally a symlink to '/usr/local/share/automake-1.12/ar-lib'.
            (delete-file "ar-lib")
            (symlink
             (string-append (assoc-ref inputs "automake") "/share/automake-"
                            ,(package-version automake) "/ar-lib")
             "ar-lib")
            #t)))))
    (home-page "http://sbsms.sourceforge.net/")
    (synopsis "Library for time stretching and pitch scaling of audio")
    (description
     "SBSMS (Subband Sinusoidal Modeling Synthesis) is software for time
stretching and pitch scaling of audio.  This package contains the library.")
    ;; There is no explicit declaration of a license, but a COPYING file
    ;; containing gpl2.
    (license license:gpl2)))

(define-public wavpack
  (package
    (name "wavpack")
    (version "5.3.2")
    (source
     (origin
       (method git-fetch)
       (uri (git-reference
             (url "https://github.com/dbry/WavPack")
             (commit "e4e8d191e8dd74cbdbeaef3232c16a7ef517e68d")))
       (sha256
        (base32 "1zj8svk6giy1abq3940sz32ygz7zldppxl47852zgn5wfm3l2spx"))
       (file-name (git-file-name name version))))
    (build-system gnu-build-system)
    (arguments
     '(#:configure-flags
       (list "--disable-static")
       #:phases
       (modify-phases %standard-phases
         (replace 'bootstrap
           ;; Running ./autogen.sh would cause premature configuration.
           (lambda _
             (invoke "autoreconf" "-vif")
             #t)))))
    (native-inputs
     `(("autoconf" ,autoconf)
       ("automake" ,automake)
       ("libtool" ,libtool)))
    (home-page "http://www.wavpack.com/")
    (synopsis "Hybrid lossless audio codec")
    (description
     "WavPack is an audio compression format with lossless, lossy and hybrid
compression modes.  This package contains command-line programs and library to
encode and decode wavpack files.")
    (license license:bsd-3)))

(define-public libmodplug
  (package
    (name "libmodplug")
    (version "0.8.9.0")
    (source (origin
              (method url-fetch)
              (uri (string-append
                    "mirror://sourceforge/modplug-xmms/"
                    name "/" version "/" name "-" version ".tar.gz"))
              (sha256
               (base32
                "1pnri98a603xk47smnxr551svbmgbzcw018mq1k6srbrq6kaaz25"))))
    (build-system gnu-build-system)
    (home-page "http://modplug-xmms.sourceforge.net/")
    (synopsis "Mod file playing library")
    (description
     "Libmodplug renders mod music files as raw audio data, for playing or
conversion.  mod, .s3m, .it, .xm, and a number of lesser-known formats are
supported.  Optional features include high-quality resampling, bass expansion,
surround and reverb.")
    (license license:public-domain)))

(define-public libxmp
  (package
    (name "libxmp")
    (version "4.4.1")
    (source (origin
              (method url-fetch)
              (uri (string-append "mirror://sourceforge/xmp/libxmp/" version "/"
                                  name "-" version ".tar.gz"))
              (sha256
               (base32
                "1kycz4jsyvmf7ny9227b497wc7y5ligydi6fvvldmkf8hk63ad9m"))))
    (build-system gnu-build-system)
    (home-page "http://xmp.sourceforge.net/")
    (synopsis "Module player library")
    (description
     "Libxmp is a library that renders module files to PCM data.  It supports
over 90 mainstream and obscure module formats including Protracker (MOD),
Scream Tracker 3 (S3M), Fast Tracker II (XM), and Impulse Tracker (IT).")
    (license license:lgpl2.1+)))

(define-public xmp
  (package
    (name "xmp")
    (version "4.1.0")
    (source (origin
              (method url-fetch)
              (uri (string-append "mirror://sourceforge/xmp/xmp/" version "/"
                                  name "-" version ".tar.gz"))
              (sha256
               (base32
                "17i8fc7x7yn3z1x963xp9iv108gxfakxmdgmpv3mlm438w3n3g8x"))))
    (build-system gnu-build-system)
    (native-inputs
     `(("pkg-config" ,pkg-config)))
    (inputs
     `(("libxmp" ,libxmp)
       ("pulseaudio" ,pulseaudio)))
    (home-page "http://xmp.sourceforge.net/")
    (synopsis "Extended module player")
    (description
     "Xmp is a portable module player that plays over 90 mainstream and
obscure module formats, including Protracker MOD, Fasttracker II XM, Scream
Tracker 3 S3M and Impulse Tracker IT files.")
    (license license:gpl2+)))

(define-public soundtouch
  (package
    (name "soundtouch")
    (version "2.1.2")
    (source
     (origin
       (method git-fetch)
       (uri (git-reference
             (url "https://gitlab.com/soundtouch/soundtouch.git")
             (commit version)))
       (file-name (git-file-name name version))
       (sha256
        (base32 "174wgm3s0inmbnkrlnspxjwm2014qhjhkbdqa5r8rbfi0nzqxzsz"))))
    (build-system gnu-build-system)
    (native-inputs
     `(("autoconf" ,autoconf)
       ("automake" ,automake)
       ("libtool" ,libtool)
       ("file" ,file)))
    (home-page "https://www.surina.net/soundtouch/")
    (synopsis
     "Audio processing library for changing tempo, pitch and playback rate")
    (description
     "SoundTouch is an audio processing library for changing the tempo, pitch
and playback rates of audio streams or audio files.  It is intended for
application developers writing sound processing tools that require tempo/pitch
control functionality, or just for playing around with the sound effects.")
    (license license:lgpl2.1+)))

(define-public sox
  (package
    (name "sox")
    (version "14.4.2")
    (source (origin
              (method url-fetch)
              (uri (string-append "mirror://sourceforge/sox/sox/" version "/"
                                  name "-" version ".tar.bz2"))
              (sha256
               (base32
                "170lx90r1nlnb2j6lg00524iwvqy72p48vii4xc5prrh8dnrb9l1"))))
    (build-system gnu-build-system)
    (arguments
     '(#:configure-flags
       ;; The upstream asks to identify the distribution to diagnose SoX
       ;; bug reports.
       '("--with-distro=Guix System Distribution")))
    (native-inputs
     `(("pkg-config" ,pkg-config)))
    (inputs
     `(("alsa-lib" ,alsa-lib)
       ("ao" ,ao)
       ("flac" ,flac)
       ("lame" ,lame)
       ("libid3tag" ,libid3tag)
       ("libltdl" ,libltdl)
       ("libmad" ,libmad)
       ("libpng" ,libpng)
       ("libvorbis" ,libvorbis)
       ("pulseaudio" ,pulseaudio)))
    (home-page "http://sox.sourceforge.net")
    (synopsis "Sound processing utility")
    (description
     "SoX (Sound eXchange) is a command line utility that can convert
various formats of computer audio files to other formats.  It can also
apply various effects to these sound files, and, as an added bonus, SoX
can play and record audio files.")
    ;; sox.c is distributed under GPL, while the files that make up
    ;; libsox are licensed under LGPL.
    (license (list license:gpl2+ license:lgpl2.1+))))

(define-public soxr
  (package
    (name "soxr")
    (version "0.1.3")
    (source
     (origin
       (method url-fetch)
       (uri
        (string-append "mirror://sourceforge/soxr/soxr-" version
                       "-Source.tar.xz"))
       (sha256
        (base32 "12aql6svkplxq5fjycar18863hcq84c5kx8g6f4rj0lcvigw24di"))))
    (build-system cmake-build-system)
    (arguments '(#:tests? #f))          ;no 'check' target
    (home-page "https://sourceforge.net/p/soxr/wiki/Home/")
    (synopsis "One-dimensional sample-rate conversion library")
    (description
     "The SoX Resampler library (libsoxr) performs one-dimensional sample-rate
conversion.  It may be used, for example, to resample PCM-encoded audio.")
    (license license:lgpl2.1+)))

(define-public twolame
  (package
    (name "twolame")
    (version "0.4.0")
    (source
     (origin
       (method url-fetch)
       (uri (string-append "mirror://sourceforge/twolame/twolame/" version
                           "/twolame-" version ".tar.gz"))
       (sha256
        (base32 "0zf8sxqb02w07ah55b1y7ab643zmpbhn62spa9pqra0rc17l4dfc"))))
    (build-system gnu-build-system)
    (inputs
     `(("libsndfile" ,libsndfile)))
    (native-inputs
     `(("perl" ,perl)
       ("which" ,which)))               ;used in tests/test.pl
    (home-page "http://www.twolame.org/")
    (synopsis "MPEG Audio Layer 2 (MP2) encoder")
    (description
     "TwoLAME is an optimised MPEG Audio Layer 2 (MP2) encoder based on
tooLAME by Mike Cheng, which in turn is based upon the ISO dist10 code and
portions of LAME.")
    (license license:lgpl2.1+)))

(define-public portaudio
  (package
    (name "portaudio")
    (version "190600.20161030")
    (source
     (origin
       (method url-fetch)
       (uri (string-append
             "http://www.portaudio.com/archives/pa_stable_v"
             (string-map (lambda (c) (if (char=? c #\.) #\_ c)) version)
             ".tgz"))
       (sha256
        (base32 "04qmin6nj144b8qb9kkd9a52xfvm0qdgm8bg8jbl7s3frmyiv8pm"))
       (patches (search-patches "portaudio-audacity-compat.patch"))))
    (build-system gnu-build-system)
    (inputs
     ;; TODO: Add ASIHPI.
     `(("alsa-lib" ,alsa-lib)
       ("jack" ,jack-1)))
    ;; Autoreconf is necessary because the audacity-compat patch modifies .in
    ;; files.
    (native-inputs
     `(("autoconf" ,autoconf)
       ("automake" ,automake)
       ("libtool" ,libtool)
       ("pkg-config" ,pkg-config)))
    (arguments
     '(#:tests? #f                      ;no 'check' target
       #:parallel-build? #f             ;fails on some systems
       #:configure-flags '("--with-pic"
                           "--enable-cxx"
                           ;; XXX: The following prevents a build error
                           ;; because of missing depcomp when C++ bindings are
                           ;; requested.
                           "--disable-dependency-tracking")
       #:phases
       (modify-phases %standard-phases
         ;; This is needed for linking the static libraries
         (add-after 'unpack 'build-only-position-independent-code
           (lambda _
             (substitute* "configure.in"
               (("AC_PROG_LIBTOOL" m)
                (string-append m "\nAM_PROG_AR\nLT_INIT([pic-only])")))
             (delete-file "configure")
             #t))
         ;; Some headers are not installed by default, but are needed by
         ;; packages like Kaldi.
         (add-after 'install 'install-missing-headers
           (lambda* (#:key outputs #:allow-other-keys)
             (install-file "src/common/pa_ringbuffer.h"
                           (string-append (assoc-ref outputs "out") "/include"))
             #t)))))
    (home-page "http://www.portaudio.com/")
    (synopsis "Audio I/O library")
    (description
     "PortAudio is a portable C/C++ audio I/O library providing a simple API
to record and/or play sound using a callback function or a blocking read/write
interface.")
    (license license:expat)))

(define-public qsynth
  (package
    (name "qsynth")
    (version "0.5.7")
    (source
     (origin
       (method url-fetch)
       (uri (string-append "mirror://sourceforge/qsynth/qsynth/" version
                           "/qsynth-" version ".tar.gz"))
       (sha256
        (base32 "18im4w8agj60nkppwbkxqnhpp13z5li3w30kklv4lgs20rvgbvl6"))))
    (build-system gnu-build-system)
    (arguments
     `(#:tests? #f))                    ; no "check" phase
    (native-inputs
     `(("qttools" ,qttools)
       ("pkg-config" ,pkg-config)))
    (inputs
     `(("fluidsynth" ,fluidsynth)
       ("qtbase" ,qtbase)
       ("qtx11extras" ,qtx11extras)))
    (home-page "https://qsynth.sourceforge.io")
    (synopsis "Graphical user interface for FluidSynth")
    (description
     "Qsynth is a GUI front-end application for the FluidSynth SoundFont
synthesizer written in C++.")
    (license license:gpl2+)))

(define-public rsound
  (package
    (name "rsound")
    (version "1.1")
    (source
     (origin
       (method git-fetch)
       (uri (git-reference
             (url "https://github.com/Themaister/RSound")
             (commit (string-append "v" version))))
       (file-name (git-file-name name version))
       (sha256
        (base32 "0gspmr3klwnq98h17p5hc6ifygya4p80g4g8r7a1qavm3mv19waf"))))
    (build-system gnu-build-system)
    (inputs
     `(("alsa-lib" ,alsa-lib)
       ("jack" ,jack-1)
       ("ao" ,ao)
       ("libsamplerate" ,libsamplerate)
       ("openal" ,openal)
       ("portaudio" ,portaudio)
       ("pulseaudio" ,pulseaudio)))
    (arguments
     '(#:phases
       (modify-phases %standard-phases
         (replace 'configure
           (lambda* (#:key outputs #:allow-other-keys)
             (setenv "CC" "gcc")
             (invoke "./configure"
                     (string-append "--prefix=" (assoc-ref outputs "out"))))))
       ;; No 'check' target.
       #:tests? #f))
    (home-page "https://themaister.net/rsound.html")
    (synopsis "Networked audio system")
    (description
     "RSound allows you to send audio from an application and transfer it
directly to a different computer on your LAN network.  It is an audio daemon
with a much different focus than most other audio daemons.")
    (license license:gpl3+)))

(define-public xjackfreak
  (package
    (name "xjackfreak")
    (version "1.0")
    (source (origin
              (method git-fetch)
              (uri (git-reference
                    (url "https://github.com/johnhldavis/xjackfreak")
                    (commit (string-append "v" version))))
              (file-name (git-file-name name version))
              (sha256
               (base32
                "18c546qidbrj0f5wfiq5llii2192xpln0ab3r4vpr7i3wybxqjfz"))))
    (build-system gnu-build-system)
    (arguments
     `(#:make-flags
       (list (string-append "docdir=" (assoc-ref %outputs "out")
                            "/share/doc/xjackfreak"))))
    (inputs
     `(("jack" ,jack-1)
       ("libx11" ,libx11)
       ("libxt" ,libxt)
       ("libxext" ,libxext)))
    (native-inputs
     `(("pkg-config" ,pkg-config)))
    (home-page "https://github.com/johnhldavis/xjackfreak")
    (synopsis "JACK audio frequency analyzer and display")
    (description
     "XJackFreak is an audio analysis and equalizing tool for the Jack Audio
Connection Kit.  It can display the FFT of any input, modify it and output the
result.")
    (license license:gpl3+)))

(define-public zita-convolver
  (package
    (name "zita-convolver")
    (version "4.0.3")
    (source (origin
              (method url-fetch)
              (uri (string-append
                    "http://kokkinizita.linuxaudio.org"
                    "/linuxaudio/downloads/zita-convolver-"
                    version ".tar.bz2"))
              (snippet
               ;; Don't optimize for a specific processor architecture.
               '(begin
                  (substitute* "source/Makefile"
                    (("^CXXFLAGS \\+= -march=native") ""))
                  #t))
              (modules '((guix build utils)))
              (sha256
               (base32
                "0prji66p86z2bzminywkwchr5bfgxcg2i8y803pydd1hzf2198cs"))))
    (build-system gnu-build-system)
    (arguments
     `(#:tests? #f ; no "check" target
       #:make-flags
       (list (string-append "PREFIX=" (assoc-ref %outputs "out"))
             (string-append "SUFFIX="))
       #:phases
       (modify-phases %standard-phases
         (add-after 'unpack 'patch-makefile-and-enter-directory
           (lambda _
             (substitute* "source/Makefile"
               (("ldconfig") "true")
               (("^LIBDIR =.*") "LIBDIR = lib\n"))
             (chdir "source")
             #t))
         (add-after 'install 'install-symlink
           (lambda _
             (symlink "libzita-convolver.so"
                      (string-append (assoc-ref %outputs "out")
                                     "/lib/libzita-convolver.so.4"))
             #t))
         ;; no configure script
         (delete 'configure))))
    (inputs `(("fftwf" ,fftwf)))
    (home-page "https://kokkinizita.linuxaudio.org")
    (synopsis "Fast, partitioned convolution engine library")
    (description
     "Zita convolver is a C++ library providing a real-time convolution
engine.")
    (license license:gpl3+)))

(define-public zita-resampler
  (package
    (name "zita-resampler")
    (version "1.6.2")
    (source (origin
              (method url-fetch)
              (uri (string-append
                    "http://kokkinizita.linuxaudio.org"
                    "/linuxaudio/downloads/zita-resampler-"
                    version ".tar.bz2"))
              (snippet
               ;; Don't optimize for a specific processor architecture.
               '(begin
                  (substitute* '("apps/Makefile" "source/Makefile")
                    (("^CXXFLAGS \\+= -march=native") ""))
                  #t))
              (modules '((guix build utils)))
              (sha256
               (base32
                "1my5k2dh2dkvjp6xjnf9qy6i7s28z13kw1n9pwa4a2cpwbzawfr3"))))
    (build-system gnu-build-system)
    (arguments
     `(#:tests? #f ; no "check" target
       #:make-flags
       (list (string-append "PREFIX=" (assoc-ref %outputs "out"))
             (string-append "SUFFIX="))
       #:phases
       (modify-phases %standard-phases
         (add-after
          'unpack 'patch-makefile-and-enter-directory
          (lambda _
            (substitute* "source/Makefile"
              (("ldconfig") "true")
              (("^LIBDIR =.*") "LIBDIR = lib\n"))
            (chdir "source")
            #t))
         (add-after
          'install 'install-symlink
          (lambda _
            (symlink "libzita-resampler.so"
                     (string-append (assoc-ref %outputs "out")
                                    "/lib/libzita-resampler.so.1"))
            #t))
         ;; no configure script
         (delete 'configure))))
    (home-page "https://kokkinizita.linuxaudio.org/linuxaudio/zita-resampler/resampler.html")
    (synopsis "C++ library for resampling audio signals")
    (description
     "Libzita-resampler is a C++ library for resampling audio signals.  It is
designed to be used within a real-time processing context, to be fast, and to
provide high-quality sample rate conversion.")
    (license license:gpl3+)))

(define-public zita-alsa-pcmi
  (package
    (name "zita-alsa-pcmi")
    (version "0.3.2")
    (source (origin
              (method url-fetch)
              (uri (string-append
                    "http://kokkinizita.linuxaudio.org"
                    "/linuxaudio/downloads/zita-alsa-pcmi-"
                    version ".tar.bz2"))
              (sha256
               (base32
                "12d7vdg74yh21w69qi0wg57iz4876j94qbiq09bvscih6xz9y78s"))))
    (build-system gnu-build-system)
    (arguments
     `(#:tests? #f ; no "check" target
       #:make-flags
       (list (string-append "PREFIX=" (assoc-ref %outputs "out"))
             (string-append "SUFFIX="))
       #:phases
       (modify-phases %standard-phases
         (add-after 'unpack 'patch-makefile-and-enter-directory
           (lambda _
             (substitute* "source/Makefile"
               (("ldconfig") "true")
               (("^LIBDIR =.*") "LIBDIR = lib\n"))
             (chdir "source")
             #t))
         (add-after 'install 'install-symlink
           (lambda _
             (symlink "libzita-alsa-pcmi.so"
                      (string-append (assoc-ref %outputs "out")
                                     "/lib/libzita-alsa-pcmi.so.0"))
             #t))
          ;; no configure script
          (delete 'configure))))
    (inputs
     `(("alsa-lib" ,alsa-lib)
       ("fftw" ,fftw)))
    (home-page "https://kokkinizita.linuxaudio.org")
    (synopsis "C++ wrapper around the ALSA API")
    (description
     "Zita-alsa-pcmi is a C++ wrapper around the ALSA API.  It provides easy
access to ALSA PCM devices, taking care of the many functions required to
open, initialise and use a hw: device in mmap mode, and providing floating
point audio data.")
    (license license:gpl3+)))

(define-public cuetools
  (package
    (name "cuetools")
    (version "1.4.1")
    (source (origin
             (method git-fetch)
             (uri (git-reference
                   (url "https://github.com/svend/cuetools")
                   (commit version)))
             (file-name (git-file-name name version))
             (sha256
              (base32
               "02ksv1ahf1v4cr2xbclsfv5x17m9ivzbssb5r8xjm97yh8a7spa3"))))
    (build-system gnu-build-system)
    ;; The source checkout is not bootstrapped.
    (native-inputs
     `(("autoconf" ,autoconf)
       ("automake" ,automake)
       ("flex" ,flex)
       ("bison" ,bison)))
    (synopsis "Cue and toc file parsers and utilities")
    (description "Cuetools is a set of programs that are useful for manipulating
and using CUE sheet (cue) files and Table of Contents (toc) files.  CUE and TOC
files are a way to represent the layout of a data or audio CD in a
machine-readable ASCII format.")
    (home-page "https://github.com/svend/cuetools")
    (license license:gpl2+)))

(define-public shntool
  (package
    (name "shntool")
    (version "3.0.10")
    (source (origin
             (method url-fetch)
             (uri (string-append "http://etree.org/shnutils/shntool/dist/src/"
                                 "shntool-" version ".tar.gz"))
             (sha256
              (base32
               "00i1rbjaaws3drkhiczaign3lnbhr161b7rbnjr8z83w8yn2wc3l"))))
    (build-system gnu-build-system)
    (synopsis "WAVE audio data processing tool")
    (description "shntool is a multi-purpose WAVE data processing and reporting
utility.  File formats are abstracted from its core, so it can process any file
that contains WAVE data, compressed or not---provided there exists a format
module to handle that particular file type.  It can also generate CUE files, and
use them split WAVE data into multiple files.")
    (home-page "http://etree.org/shnutils/shntool/")
    ;; 'install-sh' bears the x11 license
    (license (list license:gpl2+ license:x11))))

(define-public dcadec
  (package
    (name "dcadec")
    (version "0.2.0")
    (source (origin
              (method git-fetch)
              (uri (git-reference
                    (url "https://github.com/foo86/dcadec")
                    (commit (string-append "v" version))))
              (file-name (git-file-name name version))
              (sha256
               (base32
                "07nd0ajizrp1w02bsyfcv18431r8m8rq8gjfmz9wmckpg7cxj2hs"))))
    (build-system gnu-build-system)
    (arguments
     ;; Test files are missing: https://github.com/foo86/dcadec/issues/53
     '(#:tests? #f
       #:make-flags
       (list "CC=gcc"
             ;; Build shared library.
             "CONFIG_SHARED=1"
             (string-append "PREFIX=" (assoc-ref %outputs "out"))
             ;; Set proper runpath.
             (string-append "LDFLAGS=-Wl,-rpath="
                            (assoc-ref %outputs "out")
                            "/lib"))
       #:phases
       (modify-phases %standard-phases
         ;; No configure script, just a hand-written Makefile.
         (delete 'configure))))
    (synopsis "DTS Coherent Acoustics decoder")
    (description "Dcadec is a DTS Coherent Acoustics surround sound decoder
with support for HD extensions.")
    (home-page "https://github.com/foo86/dcadec")
    (license license:lgpl2.1+)))

(define-public bs1770gain
  (package
    (name "bs1770gain")
    (version "0.7.0")
    (home-page "https://manpages.debian.org/sid/bs1770gain/bs1770gain.1.en.html")
    (source
     (origin
       (method url-fetch)
       (uri (string-append "mirror://sourceforge/bs1770gain/bs1770gain/"
                           version "/bs1770gain-" version ".tar.gz"))
       (sha256
        (base32 "0a2dcaxvxy5m3a5sb1lhplsymvz3ypaiidc5xn9qy01h53zvyvkp"))
       (modules '((guix build utils)))
       (snippet
        `(begin
           ;; XXX
           (substitute* (find-files "." "\\.[ch]$")
             (("^ \\* N..o.*") ""))
           (substitute* "libbg/bgx.c"
             (("#define BG.* ") "#define BS ")
             (("BG.*NO?.*N.*S.*E.*N.*SE?") "NO")
             (("\"( #|N).*\"") "\"\""))
           (substitute* (list "config.h"
                              "configure.ac"
                              "configure")
             (("https?://bs1770gain[^/]*/")
              ,home-page))
           #t))))
    (build-system gnu-build-system)
    (inputs `(("ffmpeg" ,ffmpeg)
              ("sox" ,sox)))
    (synopsis "Tool to adjust loudness of media files")
    (description
     "BS1770GAIN is a loudness scanner compliant with ITU-R BS.1770 and its
flavors EBU R128, ATSC A/85, and ReplayGain 2.0.  It helps normalizing the
loudness of audio and video files to the same level.")
    (license license:gpl2+)))

(define-public filteraudio
  (let ((revision "1")
        (commit "2fc669581e2a0ff87fba8de85861b49133306094"))
    (package
      (name "filteraudio")
      (version (string-append "0.0.0-" revision "."
                              (string-take commit 7)))
      (source
       (origin
         (method git-fetch)
         (uri (git-reference
               (url "https://github.com/irungentoo/filter_audio")
               (commit commit)))
         (file-name (string-append name "-" version "-checkout"))
         (sha256
          (base32
           "0hbb290n3wb23f2k692a6bhc23nnqmxqi9sc9j15pnya8wifw64g"))))
      (build-system gnu-build-system)
      (arguments
       '(#:make-flags (list (string-append "PREFIX=" %output)
                            "CC=gcc")
         #:tests? #f ; No tests
         #:phases
         (modify-phases %standard-phases
           ;; No configure script
           (delete 'configure))))
      (synopsis "Lightweight audio filtering library")
      (description "An easy to use audio filtering library made from webrtc
code, used in @code{libtoxcore}.")
      (home-page "https://github.com/irungentoo/filter_audio")
      (license license:bsd-3))))

(define-public gsm
  (package
    (name "gsm")
    (version "1.0.19")
    (source
     (origin
       (method url-fetch)
       (uri
        (string-append "http://www.quut.com/" name "/" name
                       "-" version ".tar.gz"))
       (sha256
        (base32
         "1xkha9ss5g5qnfaybi8il0mcvp8knwg9plgh8404vh58d0pna0s9"))))
    (build-system gnu-build-system)
    (arguments
     `(#:test-target "tst"
       #:make-flags (list (string-append "INSTALL_ROOT=" %output))
       #:phases
       (modify-phases %standard-phases
         (add-after 'unpack 'add-fpic-ccflag
           (lambda _
             ;; The -fPIC compiler option is needed when building
             ;; mediastreamer.
             (substitute* "Makefile"
               (("^CCFLAGS.*" all)
                (string-append all "CCFLAGS += -fPIC\n")))
             #t))
         (add-before 'install 'pre-install
           (lambda _
             (let ((out (assoc-ref %outputs "out")))
               (mkdir-p (string-append out "/inc"))
               (mkdir-p (string-append out "/man"))
               (mkdir-p (string-append out "/man/man1"))
               (mkdir-p (string-append out "/man/man3"))
               (mkdir-p (string-append out "/bin"))
               (mkdir-p (string-append out "/lib")))
             #t))
         (add-after 'install 'post-install
           (lambda _
             (let ((out (assoc-ref %outputs "out")))
               (rename-file (string-append out "/inc")
                            (string-append out "/include"))
               (mkdir-p (string-append out "/include/gsm"))
               (copy-recursively "inc"
                                 (string-append out "/include/gsm")))
             #t))
         (delete 'configure))))         ; no configure script
    (synopsis "GSM 06.10 lossy speech compression library")
    (description "This C library provides an encoder and a decoder for the GSM
06.10 RPE-LTP lossy speech compression algorithm.")
    (home-page "http://quut.com/gsm/")
    (license (license:non-copyleft "file://COPYRIGHT"))))

(define-public python-pyalsaaudio
  (package
    (name "python-pyalsaaudio")
    (version "0.8.4")
    (source (origin
              (method url-fetch)
              (uri (pypi-uri "pyalsaaudio" version))
              (sha256
               (base32
                "1180ypn9596rq4b7y7dyv627j1q0fqilmkkrckclnzsdakdgis44"))))
    (build-system python-build-system)
    (arguments
     `(#:tests? #f))                   ; tests require access to ALSA devices.
    (inputs
     `(("alsa-lib" ,alsa-lib)))
    (home-page "https://larsimmisch.github.io/pyalsaaudio/")
    (synopsis "ALSA wrappers for Python")
    (description
     "This package contains wrappers for accessing the ALSA API from Python.
It is currently fairly complete for PCM devices, and has some support for
mixers.")
    (license license:psfl)))

(define-public python2-pyalsaaudio
  (package-with-python2 python-pyalsaaudio))

(define-public bluez-alsa
  (package
    (name "bluez-alsa")
    (version "2.0.0")
    (source (origin
              ;; The tarballs are mere snapshots and don't contain a
              ;; bootstrapped build system.
              (method git-fetch)
              (uri (git-reference
                    (url "https://github.com/Arkq/bluez-alsa")
                    (commit (string-append "v" version))))
              (file-name (git-file-name name version))
              (sha256
               (base32
                "08mppgnjf1j2733bk9yf0cny6rfxxwiys0s62lz2zd2lpdl6d9lz"))))
    (build-system gnu-build-system)
    (arguments
     `(#:configure-flags
       (list (string-append "--with-alsaplugindir="
                            (assoc-ref %outputs "out")
                            "/lib/alsa-lib")
             (string-append "--with-dbusconfdir="
                            (assoc-ref %outputs "out")
                            "/etc/dbus-1/system.d"))))
    (native-inputs
     `(("autoconf" ,autoconf)
       ("automake" ,automake)
       ("libtool" ,libtool)
       ("pkg-config" ,pkg-config)))
    (inputs
     `(("alsa-lib" ,alsa-lib)
       ("bluez" ,bluez)
       ("dbus" ,dbus)
       ("glib" ,glib)
       ("libbsd" ,libbsd)
       ("ncurses" ,ncurses)
       ("ortp" ,ortp)
       ("sbc" ,sbc)))
    (home-page "https://github.com/Arkq/bluez-alsa")
    (synopsis "Bluetooth ALSA backend")
    (description "This project is a rebirth of a direct integration between
Bluez and ALSA.  Since Bluez >= 5, the build-in integration has been removed
in favor of 3rd party audio applications.  From now on, Bluez acts as a
middleware between an audio application, which implements Bluetooth audio
profile, and a Bluetooth audio device.  BlueALSA registers all known Bluetooth
audio profiles in Bluez, so in theory every Bluetooth device (with audio
capabilities) can be connected.  In order to access the audio stream, one has
to connect to the ALSA PCM device called @code{bluealsa}.  The device is based
on the ALSA software PCM plugin.")
    (license license:expat)))

(define-public snd
  (package
    (name "snd")
    (version "20.5")
    (source (origin
              (method url-fetch)
              (uri (string-append "ftp://ccrma-ftp.stanford.edu/pub/Lisp/"
                                  "snd-" version ".tar.gz"))
              (sha256
               (base32
                "1frg64q2d8cia6v7jia7kahzx0apwdl0z252mzlbwqdz5960nv90"))))
    (build-system glib-or-gtk-build-system)
    (arguments
     `(#:tests? #f                      ; no tests
       #:out-of-source? #f              ; for the 'install-doc' phase
       #:configure-flags
       (let* ((out (assoc-ref %outputs "out"))
              (docdir (string-append out "/share/doc/"
                                     ,name "-" ,version)))
         (list "--with-alsa" "--with-jack" "--with-gmp"
               (string-append "--with-doc-dir=" docdir)))
       #:phases
       (modify-phases %standard-phases
         (add-after 'install 'install-doc
           (lambda* (#:key outputs #:allow-other-keys)
             (let* ((out (assoc-ref outputs "out"))
                    (doc (string-append out "/share/doc/"
                                        ,name "-" ,version)))
               (for-each
                (lambda (f)
                  (install-file f doc))
                (find-files "." "\\.html$"))
               (copy-recursively "pix" (string-append doc "/pix"))
               #t))))))
    (native-inputs
     `(("pkg-config" ,pkg-config)))
    (inputs
     `(("alsa-lib" ,alsa-lib)
       ("fftw" ,fftw)
       ("flac" ,flac)
       ("gmp" ,gmp)
       ("gsl" ,gsl)
       ("gtk+" ,gtk+)
       ("jack" ,jack-1)
       ("libsamplerate" ,libsamplerate)
       ("mpc" ,mpc)
       ("mpfr" ,mpfr)
       ("mpg123" ,mpg123)
       ("speex" ,speex)
       ("timidity++" ,timidity++)
       ("vorbis-tools" ,vorbis-tools)
       ("wavpack" ,wavpack)))
    (synopsis "Sound editor")
    (home-page "https://ccrma.stanford.edu/software/snd/")
    (description
     "Snd is a sound editor modelled loosely after Emacs.  It can be
customized and extended using either the s7 Scheme implementation (included in
the Snd sources), Ruby, or Forth.")
    (license (license:non-copyleft "file://COPYING"))))

(define-public noise-repellent
  (package
    (name "noise-repellent")
    (version "0.1.5")
    (source (origin
              (method git-fetch)
              (uri (git-reference
                    (url "https://github.com/lucianodato/noise-repellent")
                    (commit version)))
              (file-name (string-append name "-" version "-checkout"))
              (sha256
               (base32
                "0hb89x9i2knzan46q4nwscf5zmnb2nwf4w13xl2c0y1mx1ls1mwl"))))
    (build-system meson-build-system)
    (arguments
     `(#:configure-flags
       (list (string-append "--prefix=" (assoc-ref %outputs "out")
                            "/lib/lv2"))))
    (inputs
     `(("lv2" ,lv2)
       ("fftwf" ,fftwf)))
    (native-inputs
     `(("pkg-config" ,pkg-config)))
    (home-page "https://github.com/lucianodato/noise-repellent")
    (synopsis "LV2 plugin for broadband noise reduction")
    (description "Noise Repellent is an LV2 plugin to reduce noise.  It has
the following features:

@enumerate
@item Spectral gating and spectral subtraction suppression rule
@item Adaptive and manual noise thresholds estimation
@item Adjustable noise floor
@item Adjustable offset of thresholds to perform over-subtraction
@item Time smoothing and a masking estimation to reduce artifacts
@item Basic onset detector to avoid transients suppression
@item Whitening of the noise floor to mask artifacts and to recover higher
  frequencies
@item Option to listen to the residual signal
@item Soft bypass
@item Noise profile saved with the session
@end enumerate
")
    (license license:lgpl3+)))

(define-public cli-visualizer
  (package
    (name "cli-visualizer")
    (version "1.8")
    (source
     (origin
       (method git-fetch)
       (uri (git-reference
             (url "https://github.com/dpayne/cli-visualizer")
             (commit (string-append "v" version))))
       (file-name (git-file-name name version))
       (sha256
        (base32 "003mbbwsz43mg3d7llphpypqa9g7rs1p1cdbqi1mbc2bfrc1gcq2"))))
    (build-system cmake-build-system)
    (native-inputs
     ;; TODO: Try using the latest googletest for versions > 1.8.
     `( ;; ("googletest" ,googletest-1.8)
       ("which" ,which)))
    (inputs
     `(("fftw" ,fftw)
       ("ncurses" ,ncurses)
       ("pulseaudio" ,pulseaudio)))
    (arguments
     '(#:tests? #f
       ;; XXX Enable tests after patching them to use the system googletest.
       ;; #:configure-flags (list "-DVIS_WITH_TESTS=true")
       #:phases
       (modify-phases %standard-phases
         (add-after 'install 'install-examples
           (lambda* (#:key outputs #:allow-other-keys)
             (with-directory-excursion "../source/examples"
               (delete-file "mac_osx_config")
               (for-each (lambda (file)
                           (install-file file
                                         (string-append
                                          (assoc-ref outputs "out")
                                          "/share/doc")))
                         (find-files ".")))
             #t)))))
    (home-page "https://github.com/dpayne/cli-visualizer/")
    (synopsis "Command-line audio visualizer")
    (description "@code{cli-visualizer} displays fast-Fourier
transforms (FFTs) of the sound being played, as well as other graphical
representations.")
    (license license:expat)))

(define-public cava
  (package
    (name "cava")
    (version "0.6.1")
    (source (origin
              (method git-fetch)
              (uri (git-reference
                    (url "https://github.com/karlstav/cava")
                    (commit version)))
              (file-name (git-file-name name version))
              (sha256
               (base32
                "1kvhqgijs29909w3sq9m0bslx2zxxn4b3i07kdz4hb0dqkppxpjy"))))
    (build-system gnu-build-system)
    (native-inputs
     `(("autoconf" ,autoconf)
       ("automake" ,automake)
       ("libtool" ,libtool)))
    (inputs
     `(("fftw" ,fftw)
       ("ncurses" ,ncurses)
       ("pulseaudio" ,pulseaudio)))
    (arguments
     `(#:configure-flags
       (list (string-append "PREFIX=" %output)
             (string-append "FONT_DIR=" %output "/share/consolefonts"))
       #:make-flags
       (let ((lib (string-append %output "/lib")))
         (list (string-append "cava_LDFLAGS = -L" lib " -Wl,-rpath " lib)))
       #:phases
       (modify-phases %standard-phases
         (replace 'bootstrap
           (lambda* (#:key outputs #:allow-other-keys)
             (setenv "HOME" (getcwd))
             (invoke "sh" "autogen.sh")))
         (add-before 'build 'make-cava-ldflags
           (lambda* (#:key outputs #:allow-other-keys)
             (mkdir-p (string-append (assoc-ref outputs "out") "/lib"))
             #t))
         (add-after 'install 'data
           (lambda* (#:key outputs #:allow-other-keys)
             (for-each (lambda (file)
                         (install-file file
                                       (string-append (assoc-ref outputs "out")
                                                      "/share/doc/examples")))
                       (find-files "example_files"))
             #t)))))
    (home-page "https://karlstav.github.io/cava/")
    (synopsis "Console audio visualizer for ALSA, MPD, and PulseAudio")
    (description "C.A.V.A. is a bar audio spectrum visualizer for the terminal
using ALSA, MPD, PulseAudio, or a FIFO buffer as its input.")
    (license license:expat)))

(define-public fluid-3
  (let ((commit "871c8ce2002e8b3c198f532fdb4fbcce7914f951"))
    (package
      (name "fluid-3")
      (version "2.1")
      (source
       (origin
         (method url-fetch)
         ;; Only one file is required, but the release bundles the whole
         ;; software which is 50MiB as tar and 200MiB unpacked. The website
         ;; directly links the soundfont release to the github file download.
         (uri (string-append "https://github.com/musescore/MuseScore/raw/"
                             commit "/share/sound/FluidR3Mono_GM.sf3"))
         (file-name (string-append name "-" version ".sf3"))
         (sha256
          (base32
           "1hjfg5i15bw9279007xs92zsggjgn4s4k9pc00s851l3kvc6dkfg"))))
      (build-system trivial-build-system)
      (arguments
       `(#:modules ((guix build utils))
         #:builder
         (begin
           (use-modules (guix build utils))
           (let ((file (assoc-ref %build-inputs "source"))
                 (out (string-append %output "/share/soundfonts")))
             (mkdir-p out)
             (copy-file file (string-append out "/FluidR3Mono_GM.sf3"))
             #t))))
      (home-page  "https://github.com/musescore/MuseScore/tree/master/share/sound")
      (synopsis "Pro-quality GM soundfont")
      (description "Fluid-3 is Frank Wen's pro-quality GM soundfont.")
      (license license:expat))))

(define-public libfdk
  (package
    (name "libfdk")
    (version "2.0.1")
    (source
      (origin
        (method git-fetch)
        (uri (git-reference
               (url "https://github.com/mstorsjo/fdk-aac")
               (commit (string-append "v" version))))
        (file-name (git-file-name name version))
        (sha256
         (base32
          "1fkrnzs78fmj11n9z3l0w53i2fl16jcfiyavwidck9bzmkmsf486"))))
    (build-system gnu-build-system)
    (native-inputs
     `(("autoconf" ,autoconf)
       ("automake" ,automake)
       ("libtool" ,libtool)))
    (home-page "https://github.com/mstorsjo/fdk-aac")
    (synopsis "Fraunhofer FDK AAC library")
    (description "FDK is a library for encoding and decoding Advanced Audio
Coding (AAC) format audio, developed by Fraunhofer IIS, and included as part of
Android.  It supports several Audio Object Types including MPEG-2 and MPEG-4 AAC
LC, HE-AAC (AAC LC + SBR), HE-AACv2 (LC + SBR + PS) as well AAC-LD (low delay)
and AAC-ELD (enhanced low delay) for real-time communication.  The encoding
library supports sample rates up to 96 kHz and up to eight channels (7.1
                                                                     surround).")
    (license (license:fsf-free "https://github.com/mstorsjo/fdk-aac/blob/master/NOTICE"
                               "https://www.gnu.org/licenses/license-list.html#fdk"))))

(define-public libopenshot-audio
  (package
    (name "libopenshot-audio")
    (version "0.2.0")
    (source (origin
              (method git-fetch)
              (uri (git-reference
                    (url "https://github.com/OpenShot/libopenshot-audio")
                    (commit (string-append "v" version))))
              (file-name (git-file-name name version))
              (sha256
               (base32
                "13if0m5mvlqly8gmbhschzb9papkgp3yqivklhb949dhy16m8zgf"))))
    (build-system cmake-build-system)
    (inputs
     `(("alsa-lib" ,alsa-lib)
       ;; The following are for JUCE GUI components:
       ("libx11" ,libx11)
       ("freetype" ,freetype)
       ("libxrandr" ,libxrandr)
       ("libxinerama" ,libxinerama)
       ("libxcursor" ,libxcursor)))
    (arguments
     `(#:tests? #f                      ;there are no tests
       #:configure-flags
       (list (string-append "-DCMAKE_CXX_FLAGS=-I"
                            (assoc-ref %build-inputs "freetype")
                            "/include/freetype2"))))
    (home-page "https://openshot.org")
    (synopsis "Audio editing and playback for OpenShot")
    (description "OpenShot Audio Library (libopenshot-audio) allows
high-quality editing and playback of audio, and is based on the JUCE
library.")
    (license license:lgpl3+)))

(define-public faudio
  (package
    (name "faudio")
    (version "19.11")
    (source
     (origin
       (method git-fetch)
       (uri (git-reference
             (url "https://github.com/FNA-XNA/FAudio")
             (commit version)))
       (file-name (git-file-name name version))
       (sha256
        (base32 "0ckpr6ffz8ssfh1y850dhip5s5jv0j6n90qz5yx1v9d6gpwf08rp"))))
    (arguments
     '(#:tests? #f                      ; No tests.
       #:configure-flags '("-DFFMPEG=ON")))
    (build-system cmake-build-system)
    (native-inputs `(("pkg-config" ,pkg-config)))
    (inputs `(("ffmpeg" ,ffmpeg)
              ("sdl2" ,sdl2)))
    (home-page "https://github.com/FNA-XNA/FAudio")
    (synopsis "XAudio reimplementation")
    (description "FAudio is an XAudio reimplementation that focuses solely on
developing fully accurate DirectX Audio runtime libraries.")
    (license license:zlib)))

(define-public gnaural
  (package
    (name "gnaural")
    (version "20110606")
    (source
     (origin
       (method url-fetch)
       (uri (string-append "mirror://sourceforge/gnaural/Gnaural/gnaural_"
                           version ".tar.xz"))
       (sha256
        (base32
         "1gq519c0imsh57zklyi0f8h64l3ai48lh672c834470z8c6kvbfi"))))
    (build-system gnu-build-system)
    (inputs
     `(("alsa-lib" ,alsa-lib)
       ("gtk+" ,gtk+-2)
       ("libsndfile" ,libsndfile)
       ("portaudio" ,portaudio)))
    (native-inputs
     `(("pkg-config" ,pkg-config)))
    (home-page "http://gnaural.sourceforge.net/")
    (synopsis "Binaural beat synthesizer")
    (description "Gnaural is a programmable auditory binaural beat synthesizer
intended to be used for brainwave entrainment.  Gnaural supports creation of
binaural beat tracks of different frequencies and exporting of tracks into
different audio formats.  Gnaural can also be linked over the internet with
other Gnaural instances, allowing synchronous sessions between many users.")
    (license license:gpl2+)))

(define-public darkice
  (package
    (name "darkice")
    (version "1.4")
    (source (origin
              (method url-fetch)
              (uri (string-append "https://github.com/rafael2k/darkice/releases/"
                                  "download/v" version "/darkice-"
                                  version ".tar.gz"))
              (sha256
               (base32
                "05yq7lggxygrkd76yiqby3msrgdn082p0qlvmzzv9xbw8hmyra76"))))
    (build-system gnu-build-system)
    (native-inputs `(("pkg-config" ,pkg-config)))
    (inputs `(("lame" ,lame)
              ("libvorbis" ,libvorbis)
              ("opus" ,opus)
              ("twolame" ,twolame)
              ("alsa-lib" ,alsa-lib)
              ("pulseaudio" ,pulseaudio)
              ("jack" ,jack-1)
              ("libsamplerate" ,libsamplerate)))
    (arguments
     `(#:configure-flags
       (list (string-append "--with-lame-prefix="
                            (assoc-ref %build-inputs "lame")))))
    (home-page "http://www.darkice.org/")
    (synopsis "Live audio streamer")
    (description "DarkIce is a live audio streamer.  It takes audio input from
a sound card, encodes it into Ogg Vorbis and/or mp3, and sends the audio
stream to one or more IceCast and/or ShoutCast servers.")
    (license license:gpl3+)))

(define-public libltc
  (package
    (name "libltc")
    (version "1.3.1")
    (source
     (origin
       (method url-fetch)
       (uri
        (string-append "https://github.com/x42/libltc/releases/download/v"
                       version "/libltc-" version ".tar.gz"))
       (sha256
        (base32
         "173h9dgmain3nyrwk6q2d7yl4fnh4vacag4s2p01n5b7nyrkxrjh"))))
    (build-system gnu-build-system)
    (arguments
     `(#:parallel-tests? #f))           ;tests fail otherwise
    (native-inputs
     `(("doxygen" ,doxygen)
       ("pkg-config" ,pkg-config)))
    (synopsis "Encode or decode Linear/Longitudinal Time Code (LTC) audio")
    (description "Libltc is a POSIX-C Library for handling
@dfn{Linear/Longitudinal Time Code} (LTC) data.")
    (home-page "https://x42.github.io/libltc/")
    (license license:lgpl3+)))

(define-public ttaenc
  (package
    (name "ttaenc")
    (version "3.4.1")
    (source
     (origin
       (method url-fetch)
       (uri (string-append "mirror://sourceforge/tta/"
                           "tta/ttaenc-src"
                           "/ttaenc-" version "-src.tgz"))
       (sha256
        (base32
         "1iixpr4b89g9g1hwn8ak8k8iflcww3r5f09a117qdidc2nqcijdj"))))
    (build-system gnu-build-system)
    (arguments
     `(#:tests? #f                      ;no tests
       #:make-flags
       (list (string-append "CC=" ,(cc-for-target))
             (string-append "INSDIR=" (assoc-ref %outputs "out") "/bin"))
       #:phases
       (modify-phases %standard-phases
         (delete 'configure)            ; no configure
         (add-before 'install 'make-bindir
           (lambda* (#:key outputs #:allow-other-keys)
             (let* ((out (assoc-ref outputs "out")))
               (mkdir-p (string-append out "/bin"))
               #t))))))
    (synopsis "TTA lossless audio encoder")
    (description
     "TTA performs lossless compression on multichannel 8,16 and 24 bits
data of the Wav audio files.  Being lossless means that no data-
quality is lost in the compression - when uncompressed, the data will
be identical to the original.  The compression ratios of TTA depend on
the type of music file being compressed, but the compression size
will generally range between 30% - 70% of the original.  TTA format
supports both of ID3v1/v2 and APEv2 tags.")
    (home-page "http://tausoft.org/")
    (license license:gpl2+)))

(define-public redkite
  (package
    (name "redkite")
    (version "0.8.1")
    (source
     (origin
       (method git-fetch)
       (uri (git-reference
             (url "https://gitlab.com/geontime/redkite.git")
             (commit (string-append "v" version))))
       (file-name (git-file-name name version))
       (sha256
        (base32 "17kv2jc4jvn3sdicz3sf8dnf25wbvv7ijzkr0mm0sbrrjz6vrwz0"))))
    (build-system cmake-build-system)
    (arguments
     `(#:tests? #f))                    ;no tests included
    (inputs
     `(("cairo" ,cairo)))
    (native-inputs
     `(("pkg-config", pkg-config)))
    (synopsis "Small GUI toolkit")
    (description "Redkite is a small GUI toolkit developed in C++17 and
inspired from other well known GUI toolkits such as Qt and GTK.  It is
minimal on purpose and is intended to be statically linked to applications,
therefore satisfying any requirements they may have to be self contained,
as is the case with audio plugins.")
    (home-page "https://gitlab.com/geontime/redkite")
    (license license:gpl3+)))

(define-public carla
  (package
    (name "carla")
    (version "2.1.1")
    (source
     (origin
       (method git-fetch)
       (uri
        (git-reference
         (url "https://github.com/falkTX/Carla")
         (commit (string-append "v" version))))
       (file-name (git-file-name name version))
       (sha256
        (base32
         "0c3y4a6cgi4bv1mg57i3qn5ia6pqjqlaylvkapj6bmpsw71ig22g"))))
    (build-system gnu-build-system)
    (arguments
     `(#:tests? #f                      ; no "check" target
       #:make-flags
       (list (string-append "PREFIX=" (assoc-ref %outputs "out")))
       #:phases
       (modify-phases %standard-phases
         (delete 'configure)            ; no configure script
         (add-before 'build 'set-CC-variable-and-show-features
           (lambda _
             (setenv "CC" "gcc")
             (invoke "make" "features")))
         (add-after 'install 'make-carla-executable
           (lambda* (#:key outputs #:allow-other-keys)
             (let ((out (assoc-ref outputs "out")))
               (chmod (string-append out "/share/carla/carla") #o555)
               #t)))
         (add-after 'install 'wrap-executables
           (lambda* (#:key outputs #:allow-other-keys)
             (let ((out (assoc-ref outputs "out")))
               (wrap-script (string-append out "/bin/carla")
                            `("PYTHONPATH" ":" prefix (,(getenv "PYTHONPATH"))))
               #t))))))
    (inputs
     `(("alsa-lib" ,alsa-lib)
       ("ffmpeg" ,ffmpeg)
       ("fluidsynth" ,fluidsynth)
       ("file" ,file)
       ("liblo" ,liblo)
       ("libsndfile" ,libsndfile)
       ("gtk2" ,gtk+-2)   ;needed for bridging GTK2 plugins in GTK3 hosts
       ("gtk+" ,gtk+)
       ("python-pyliblo" ,python-pyliblo)
       ("python-pyqt" ,python-pyqt)
       ("python-rdflib" ,python-rdflib)
       ;; python-pyqt shows the following error without python-wrapper:
       ;; Error while finding module specification for 'PyQt5.uic.pyuic'
       ;; (ModuleNotFoundError: No module named 'PyQt5')
       ("python-wrapper" ,python-wrapper)
       ("libx11" ,libx11)
       ("qtbase" ,qtbase)
       ("zlib" ,zlib)

       ;; For WRAP-SCRIPT above.
       ("guile" ,guile-2.2)))
    (native-inputs
     `(("pkg-config" ,pkg-config)))
    (home-page "https://kx.studio/Applications:Carla")
    (synopsis "Audio plugin host")
    (description "Carla is a modular audio plugin host, with features like
transport control, automation of parameters via MIDI CC and remote control
over OSC.  Carla currently supports LADSPA (including LRDF), DSSI, LV2, VST2,
and VST3 plugin formats, plus SF2 and SFZ file support.  It uses JACK as the
default and preferred audio driver but also supports native drivers like ALSA.")
    (license license:gpl2+)))

(define-public ecasound
  (package
    (name "ecasound")
    (version "2.9.3")
    (source (origin
              (method url-fetch)
              (uri (string-append "https://nosignal.fi/download/ecasound-"
                                  version ".tar.gz"))
              (sha256
               (base32 "1m7njfjdb7sqf0lhgc4swihgdr4snkg8v02wcly08wb5ar2fr2s6"))))
    (build-system gnu-build-system)
    (native-inputs `(("pkg-config" ,pkg-config)))
    ;; It would be nice to add mikmod to inputs if that gets packaged
    ;; eventually.
    (inputs `(("alsa-lib" ,alsa-lib)
              ("jack" ,jack-1)
              ("mpg123" ,mpg123)
              ("lame" ,lame)
              ("vorbis-tools" ,vorbis-tools)
              ("faad2" ,faad2)
              ("flac" ,flac)
              ("timidity++" ,timidity++)
              ("libsndfile" ,libsndfile)
              ("libsamplerate" ,libsamplerate)
              ("ncurses" ,ncurses)
              ("ladspa" ,ladspa)
              ("lilv" ,lilv)))
    (home-page "https://nosignal.fi/ecasound/index.php")
    (synopsis "Multitrack audio processing")
    (description "Ecasound is a software package designed for multitrack audio
processing. It can be used for simple tasks like audio playback, recording and
format conversions, as well as for multitrack effect processing, mixing,
recording and signal recycling. Ecasound supports a wide range of audio inputs,
outputs and effect algorithms. Effects and audio objects can be combined in
various ways, and their parameters can be controlled by operator objects like
oscillators and MIDI-CCs. A versatile console mode user-interface is included
in the package.")
    ;; As an exception to the above, the C, C++ and python implementations
    ;; of the Ecasound Control Interface (ECI) are licensed under the LGPL
    ;; (see the file 'COPYING.LGPL'). This allows writing ECI applications
    ;; that are not licensed under GPL.
    (license (list license:gpl2 license:lgpl2.1))))

(define-public libaudec
  (package
    (name "libaudec")
    (version "0.2.2")
    (source
      (origin
        (method git-fetch)
        (uri (git-reference
               (url "https://git.zrythm.org/git/libaudec")
               (commit (string-append "v" version))))
        (file-name (git-file-name name version))
        (sha256
          (base32
            "04mpmfmqc43asw0m3zxhb6jj4qms7x4jw7mx4xb1d3lh16xllniz"))))
   (build-system meson-build-system)
   (arguments
    `(#:configure-flags `("-Denable_tests=true -Denable_ffmpeg=true")))
   (inputs
    `(("libsamplerate" ,libsamplerate)
      ("libsndfile" ,libsndfile)
      ("ffmpeg" ,ffmpeg)))
   (native-inputs
     `(("pkg-config", pkg-config)))
   (synopsis "Library for reading and resampling audio files")
   (description "libaudec is a wrapper library over ffmpeg, sndfile and
libsamplerate for reading and resampling audio files, based on Robin Gareus'
@code{audio_decoder} code.")
   (home-page "https://git.zrythm.org/cgit/libaudec")
   (license license:agpl3+)))

(define-public lv2lint
  (package
    (name "lv2lint")
    (version "0.4.0")
    (source
      (origin
        (method git-fetch)
        (uri (git-reference
               (url "https://git.open-music-kontrollers.ch/lv2/lv2lint")
               (commit version)))
        (file-name (git-file-name name version))
        (sha256
          (base32
            "1pspwqpzl2dw1hd9ra9yr53arqbbqjn7d7j0f7p9g3iqa76vblpi"))))
    (build-system meson-build-system)
    (arguments
     `(#:configure-flags
       `("-Delf-tests=true" ; for checking symbol visibility
         "-Donline-tests=true"))) ; for checking URI existence
    (inputs
      `(("curl", curl)
        ("libelf", libelf)
        ("lilv", lilv)))
    (native-inputs
      `(("pkg-config", pkg-config)))
    (synopsis "LV2 plugin lint tool")
    (description "lv2lint is an LV2 lint-like tool that checks whether a
given plugin and its UI(s) match up with the provided metadata and adhere
to well-known best practices.")
    (home-page "https://open-music-kontrollers.ch/lv2/lv2lint/")
    (license license:artistic2.0)))

(define-public lv2toweb
  (package
    (name "lv2toweb")
    (version "0.4")
    (source
      (origin
        (method git-fetch)
        (uri (git-reference
               (url "https://github.com/x42/lv2toweb")
               (commit (string-append "v" version))))
        (file-name (git-file-name name version))
        (sha256
          (base32
            "007aysqvgkf25za8nkmyd5g9kp1zla460dcpidlj5xg1zc3fcdfi"))))
    (build-system gnu-build-system)
    (arguments
    `(#:tests? #f  ; no "check" target
      #:make-flags (list "CC=gcc"
                         (string-append "PREFIX=" (assoc-ref %outputs "out")))
      #:phases
      (modify-phases %standard-phases
        (delete 'configure))))
    (inputs
      `(("jalv", jalv)
        ("lilv", lilv)))
    (native-inputs
      `(("help2man", help2man)
        ("pkg-config", pkg-config)))
    (synopsis "Documentation generator for LV2 plugins")
    (description
      "lv2toweb allows the user to create an xhtml page with information
about the given LV2 plugin, provided that the plugin and its UI(s) match up
with the provided metadata and adhere to well-known best practices.")
    (home-page "https://github.com/x42/lv2toweb")
    (license (list license:isc license:gpl2))))

(define-public ztoolkit
  (package
    (name "ztoolkit")
    (version "0.1.1")
    (source
     (origin
       (method git-fetch)
       (uri (git-reference
             (url "https://git.zrythm.org/git/ztoolkit")
             (commit (string-append "v" version))))
       (file-name (git-file-name name version))
       (sha256
        (base32
         "07xl3cmdaf7k9mm58m93cn8i1jvgimmiifdw1w7v2jl88nx60pm1"))))
    (build-system meson-build-system)
    (inputs
     `(("cairo" ,cairo)
       ("libx11" ,libx11)))
    (native-inputs
     `(("pkg-config" ,pkg-config)))
    (synopsis "GUI toolkit for LV2 plugins")
    (description "ZToolkit (Ztk) is a cross-platform GUI toolkit heavily
inspired by GTK.  It handles events and low level drawing on behalf of
the user and provides a high-level API for managing the UI and custom
widgets.  ZToolkit is written in C and was created to be used for building
audio plugin UIs, where the dependencies often need to be kept to a
minimum.")
    (home-page "https://git.zrythm.org/cgit/ztoolkit/")
    (license license:agpl3+)))

(define-public ztoolkit-rsvg
  (package
    (inherit ztoolkit)
    (name "ztoolkit-rsvg")
    (arguments
     `(#:configure-flags `("-Denable_rsvg=true")))
    (inputs
     `(("librsvg" ,librsvg)
       ,@(package-inputs ztoolkit)))
    (synopsis "ZToolkit with SVG support")))

(define-public codec2
  (package
    (name "codec2")
    (version "0.9.2")
    (source
     (origin
       (method git-fetch)
       (uri (git-reference
             (url "https://github.com/drowe67/codec2")
             (commit (string-append "v" version))))
       (file-name (git-file-name name version))
       (sha256
        (base32 "1jpvr7bra8srz8jvnlbmhf8andbaavq5v01qjnp2f61za93rzwba"))))
    (build-system cmake-build-system)
    (native-inputs
     `(("bc" ,bc)
       ("octave" ,octave)
       ("valgrind" ,valgrind)))
    (arguments
     `(#:tests? #f ; TODO: Fix tests (paths, graphic toolkit, octave modules).
       #:phases
       (modify-phases %standard-phases
         (add-before 'check 'set-test-environment
           (lambda _
             (setenv "HOME" "/tmp")
             #t)))))
    (synopsis "Speech codec")
    (description
     "Codec 2 is a speech codec designed for communications quality speech
between 700 and 3200 bit/s.  The main application is low bandwidth HF/VHF
digital radio.")
    (home-page "https://www.rowetel.com/?page_id=452")
    (license license:lgpl2.1)))

(define-public ableton-link
  (package
    (name "ableton-link")
    (version "3.0.2")
    (source (origin
              (method git-fetch)
              (uri (git-reference
                    (url "https://github.com/Ableton/link")
                    (commit (string-append "Link-" version))))
              (file-name (git-file-name name version))
              (sha256
               (base32
                "0262vm0v7hmqjhqx5xikh529p3c065p1yld6ymaiz74yq1dnnjir"))
              (modules '((guix build utils)))
              (patches
               (search-patches "ableton-link-system-libraries-debian.patch"))
              (snippet
               '(begin
                  ;; Tests assume that CMake's "build" directory is a
                  ;; sub-directory of the source tree, so we fix it.
                  (substitute* "ci/run-tests.py"
                    (("root_dir,") "root_dir, os.pardir,"))
                  ;; Unbundle dependencies.
                  (delete-file-recursively "third_party")
                  (delete-file-recursively "modules")
                  #t))))
    (build-system cmake-build-system)
    (native-inputs
     `(("catch" ,catch-framework)
       ("python" ,python)       ;for running tests
       ("portaudio" ,portaudio) ;for portaudio examples
       ("qtbase" ,qtbase)       ;for Qt examples
       ("qtdeclarative" ,qtdeclarative)
       ("qttools" ,qttools)))
    (inputs
     `(("jack" ,jack-1)                       ;for JACK examples
       ("qtquickcontrols" ,qtquickcontrols))) ;for Qt examples
    (propagated-inputs
     ;; This is because include/ableton/platforms/asio/AsioWrapper.hpp
     ;; contains '#include <asio.hpp>'.
     `(("asio" ,asio)))
    (arguments
     `(#:configure-flags
       '("-DLINK_BUILD_QT_EXAMPLES=ON"
         "-DLINK_BUILD_JACK=ON")
       #:phases
       (modify-phases %standard-phases
         (replace 'check
           (lambda* (#:key inputs #:allow-other-keys)
             (let* ((python (string-append (assoc-ref inputs "python")
                                          "/bin/python3"))
                   (run-tests (string-append "../ableton-link-"
                                             ,version
                                             "-checkout/ci/run-tests.py")))
               (invoke python run-tests "--target" "LinkCoreTest")
               (invoke python run-tests "--target" "LinkDiscoveryTest"))))
         (add-before 'install 'patch-cmake
           (lambda* (#:key inputs #:allow-other-keys)
             (let* ((source (string-append "../ableton-link-"
                                                ,version
                                                "-checkout/")))
               (substitute* (string-append source
                                           "cmake_include/AsioStandaloneConfig.cmake")
                 (((string-append "\\$\\{CMAKE_CURRENT_LIST_DIR\\}/\\.\\./"
                                  "modules/asio-standalone/asio/include"))
                  (string-append (assoc-ref inputs "asio")
                                 "/include")))
               (substitute* (string-append source "AbletonLinkConfig.cmake")
                 (("\\$\\{CMAKE_CURRENT_LIST_DIR\\}/include")
                  "${CMAKE_CURRENT_LIST_DIR}/../../../include")
                 (("\\$\\{CMAKE_CURRENT_LIST_DIR\\}/include/ableton/Link\\.hpp")
                  "${CMAKE_CURRENT_LIST_DIR}/../../../include/ableton/Link.hpp"))
               #t)))
         (replace 'install
           (lambda* (#:key outputs #:allow-other-keys)
             (let* ((out (assoc-ref outputs "out"))
                    (bin (string-append out "/bin"))
                    (lib-cmake (string-append out "/lib/cmake/ableton-link"))
                    (source (string-append "../ableton-link-" ,version "-checkout")))
               (for-each (lambda (test-file)
                           (delete-file test-file))
                         '("bin/LinkDiscoveryTest" "bin/LinkCoreTest"))
               (copy-recursively "bin" bin)
               (copy-recursively (string-append source "/include/ableton")
                                 (string-append out "/include/ableton"))
               (install-file (string-append source "/AbletonLinkConfig.cmake")
                             lib-cmake)
               (install-file (string-append source
                                            "/cmake_include/AsioStandaloneConfig.cmake")
                             (string-append lib-cmake "/cmake_include"))
               #t))))))
    (home-page "https://github.com/Ableton/link")
    (synopsis "Synchronize musical beat, tempo, and phase across multiple applications")
    (description
     "Ableton Link is a C++ library that synchronizes musical beat, tempo, and phase
across multiple applications running on one or more devices.  Applications on devices
connected to a local network discover each other automatically and form a musical
session in which each participant can perform independently: anyone can start or stop
while still staying in time.")
    (license license:gpl2+)))