(contents of app/ directory)
The MIT License (MIT)
Copyright (c) 2012 - 2026 Samuel Aaron and contributors (sam@sonic-pi.net)
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
As Sonic Pi links with and contains GPLv3-licensed software, distributors of Sonic Pi GUI binaries must comply with the terms of the GPL.
(contents of etc/samples/)
All the bundled samples are individually licensed under a CC0 1.0 Universal Public Domain Dedication. They have been obtained from freesound.org and links to their sources can be found in the file etc/samples/README.md
Two exceptions: the samples prefixed with arovane_ have been kindly donated
by Uwe Zahn (Arovane), and those prefixed
with tbd_ by The Black Dog — both also under a
CC0 license. Thanks Uwe and TBD!
http://creativecommons.org/publicdomain/zero/1.0/
(contents of etc/wavetables/
All the bundled wavetable samples are individually licensed under a CC0 1.0 Universal Public Domain Dedication. They have been obtained from the Adventure Kid site.
The font used in the GUI is Hack released under the Hack Open Font License v2.0
Some GUI icons are from Tabler Icons released under the MIT License (Copyright (c) 2020-2026 Paweł Kuna). See app/gui/widgets/Tabler-Icons-License.md.
(contents of etc/doc/ and etc/examples directories)
All the examples (in
etc/examples)
and contents of the doc directory including the articles and the
tutorial are copyright by Sam Aaron unless a specific author is stated
with the comment # coded by ... in which case the copyright is
associated with that author (2015) and the content is released under the
CC BY-SA 4.0 license:
http://creativecommons.org/licenses/by-sa/4.0/
(contents of etc/synthdefs/ directory)
The bundled synth designs (synthdefs) are licensed under the MIT License with the following exceptions, which are licensed under the GNU General Public License v3:
- etc/synthdefs/designs/supercollider/bass_foundation.scd
- etc/synthdefs/designs/supercollider/bass_highend.scd
- etc/synthdefs/designs/supercollider/winwood_lead.scd
- etc/synthdefs/designs/supercollider/organ_tonewheel.scd
- etc/synthdefs/designs/supercollider/autotuner.sc (derived from PitchShiftPA, GPL-3.0)
The sc808 drum synths are adapted from Yoshinosuke Horiuchi's SC-808, released free of charge with the author's published permission for free use; the original carries no formal licence text. The adaptations retain attribution in their source headers.
The Overtone designs under designs/overtone/ are licensed under the
Eclipse Public License 2.0 (see the LICENSE file in that directory).
See the source files for links to the original designs.
The following is a list of the software included in Sonic Pi with their relevant licenses:
- Ruby 4.0 - dual Ruby License / BSD 2-Clause
- SuperSonic - SuperSonic's own code is MIT OR GPL-3.0-or-later; it contains the SuperCollider-derived scsynth engine core (GPL-2.0-or-later, Copyright (c) James McCartney), so the combined binary is distributed under GPL terms. Its full component list is below.
- aubio_onset (built from aubio 0.4.9) - GPL-3.0-or-later; statically includes libsndfile (LGPL-2.1) and FLAC, ogg, vorbis, opus (all BSD 3-Clause)
- Qt 6 - GNU Lesser General Public License v3 (dynamically linked frameworks)
- QScintilla 2.14.1 (vendored Sonic Pi fork, statically linked) - GNU General Public License v3
- Scintilla (within QScintilla) - Scintilla License (permissive)
- OpenSSL 3 - Apache License 2.0 (dynamic libraries, used by the bundled Ruby)
- KISS FFT - BSD 3-Clause License (dynamic library)
- ghc_filesystem - MIT License
- kissnet - MIT License
- oscpkt - zlib License
- PlatformFolders - MIT License (Windows only)
- reproc - MIT License
- TLSF 2.4.6 - dual GPL-2.0 / LGPL-2.1 with an explicit linking exception
- Spout2 - BSD 2-Clause License (Windows only)
- Syphon - BSD 3-Clause License (macOS only)
- SuperSmoothy (SuperSonic's audio-device layer, a vendored fork of the permissively-licensed modules of JUCE 7.0.12) - ISC License; includes zlib (zlib License)
- SuperCollider scsynth-derived engine core (incl. nova-simd) - GPL-2.0-or-later
- MdaPiano synth + piano wavetable data (Paul Kellett / Dan Stowell, from the mda plug-ins) - dual MIT / GPL-2.0-or-later
- libsndfile - GNU Lesser General Public License v2.1
- FLAC, ogg, vorbis, opus - BSD 3-Clause License
- Ableton Link (with local patches, conveyed in the SuperSonic repo) - GPL-2.0-or-later
- asio (standalone) (vendored within Link) - Boost Software License 1.0
- TLSF 2.4.6 - dual GPL-2.0 / LGPL-2.1
- oscpack - permissive (MIT-style) licence
- Rust subsystems (MIDI / gamepad / OSC networking): midir fork (MIT) plus permissively-licensed crates (MIT / Apache-2.0 / BSD / ISC / Zlib), enforced by a cargo-deny licence allowlist
- Steinberg ASIO SDK 2.3.4 - used under its GPL-3.0 option (Windows only)
(contents of app/server/ruby/vendor/)
- Blankslate - MIT License
- Concurrent Ruby - MIT License
- gettext - dual Ruby License / LGPL-3.0-or-later
- i18n - MIT License
- Kramdown - MIT License
- Locale - dual Ruby License / GPL-2.0
- Memoist - MIT License
- Metaclass - MIT License
- MiniTest - MIT License
- Mocha - dual Ruby License / MIT License
- Multi JSON - MIT License
- Rouge - MIT License
- Ruby Beautify - MIT License
- Rugged - MIT License; statically bundles libgit2 (GPL-2.0 with linking exception)
- Text - MIT License
- Titleize - MIT License
- Tomlrb - MIT License
- TZ Info - MIT License