Open-source MIDI libraries

396 shown

• MuseScore

  Stars: 15k

  musescore/MuseScore

  Full-featured music notation software with MIDI import/export.

  Notation C++ Other Active 2026

• Tone.js

  Stars: 15k

  Tonejs/Tone.js

  Web Audio framework for interactive music: synths, effects, and a transport.

  Web JavaScript MIT Active 2026

• Sonic Pi

  Stars: 12k

  sonic-pi-net/sonic-pi

  Code-based live-coding synth with MIDI in/out.

  DAW / Live Ruby Other Active 2026

• AudioKit

  Stars: 11k

  AudioKit/AudioKit

  Audio synthesis, processing, and MIDI framework for Apple platforms.

  Realtime Swift MIT Active 2026

• LMMS

  Stars: 10k

  LMMS/lmms

  Cross-platform music production software with piano-roll and MIDI support.

  DAW / Live C++ GPL-2.0 Active 2026

• JUCE

  Stars: 9.0k

  juce-framework/JUCE

  The cross-platform C++ framework for audio apps and plugins, with full MIDI and MPE.

  DAW / Live C++ Other Active 2026

• Mixxx

  Stars: 7.2k

  mixxxdj/mixxx

  DJ software with a large library of MIDI controller mappings.

  DAW / Live C++ Other Active 2026

• TinyUSB

  Stars: 7.2k

  hathach/tinyusb

  Embedded USB host/device stack with class-compliant USB-MIDI support.

  Hardware C MIT Active 2026

• SuperCollider

  Stars: 6.8k

  supercollider/supercollider

  Audio server and language for real-time synthesis and algorithmic composition.

  Synthesis C++ GPL-3.0 Active 2026

• NAudio

  Stars: 6.2k

  naudio/NAudio

  .NET audio and MIDI library for Windows, including MIDI in/out and file support.

  Realtime C# MIT Active 2026

• Overtone

  Stars: 6.2k

  overtone/overtone

  Collaborative programmable music built on SuperCollider, with MIDI.

  DAW / Live Clojure Other Active 2026

• Basic Pitch

  Stars: 5.9k

  spotify/basic-pitch

  Lightweight polyphonic audio-to-MIDI transcription with pitch bends.

  ML Python Apache-2.0 Active 2025

• Ardour

  Stars: 5.3k

  Ardour/ardour

  Professional open-source DAW with full MIDI recording and editing.

  DAW / Live C++ Other Active 2026

• ORCA

  Stars: 5.1k

  hundredrabbits/Orca

  Esoteric live-coding grid that sequences MIDI, OSC, and UDP.

  DAW / Live JavaScript MIT Active 2025

• Bespoke Synth

  Stars: 4.7k

  BespokeSynth/BespokeSynth

  Modular DAW for live patching, with extensive MIDI controller mapping.

  DAW / Live C++ GPL-3.0 Active 2026

• VCV Rack

  Stars: 4.4k

  VCVRack/Rack

  Virtual Eurorack modular synthesizer platform with MIDI modules.

  Synthesis C++ Other Active 2025

• OpenUtau

  Stars: 4.4k

  openutau/OpenUtau

  Singing synthesis editor with MIDI import.

  DAW / Live C# MIT Active 2026

• Tonal

  Stars: 4.3k

  tonaljs/tonal

  Functional music-theory library: notes, intervals, chords, scales, MIDI numbers.

  Notation TypeScript Active 2026

• Surge XT

  Stars: 4.1k

  surge-synthesizer/surge

  Hybrid synthesizer with full MPE and microtuning support.

  Synthesis C++ GPL-3.0 Active 2026

• Furnace

  Stars: 3.9k

  tildearrow/furnace

  Multi-system chiptune tracker with MIDI input.

  DAW / Live C++ Other Active 2026

• Scribbletune

  Stars: 3.8k

  scribbletune/scribbletune

  Create clips and patterns with code and export them as MIDI files.

  Web TypeScript MIT Active 2026

• Dexed

  Stars: 3.6k

  asb2m10/dexed

  DX7 FM plugin synth that reads original DX7 SysEx cartridges.

  Synthesis C++ GPL-3.0 Active 2026

• Helio

  Stars: 3.6k

  helio-fm/helio-sequencer

  Lightweight, minimalist music sequencer for desktop and mobile.

  DAW / Live C++ GPL-3.0 Active 2026

• Cardinal

  Stars: 3.2k

  DISTRHO/Cardinal

  VCV Rack modules packaged as a self-contained plugin with MIDI.

  Synthesis C++ GPL-3.0 Active 2026

• Mutable Instruments Eurorack

  Stars: 3.2k

  pichenettes/eurorack

  Firmware for Mutable Instruments modules, including MIDI interfaces.

  Hardware C++ Active 2026

• Faust

  Stars: 3.2k

  grame-cncm/faust

  Functional DSP language for synths and effects, with MIDI-driven polyphony.

  Synthesis C++ Other Active 2026

• Zrythm

  Stars: 3.2k

  zrythm/zrythm

  Highly automated, intuitive digital audio workstation.

  DAW / Live C++ Other Active 2026

• nih-plug

  Stars: 3.0k

  robbert-vdh/nih-plug

  Rust audio plugin framework with note events and MIDI support.

  DAW / Live Rust ISC Active 2026

• Audiveris

  Stars: 2.9k

  Audiveris/audiveris

  Optical music recognition: scanned scores to MusicXML.

  Notation Java AGPL-3.0 Active 2026

• music21

  Stars: 2.6k

  cuthbertLab/music21

  Toolkit for computer-aided musicology with MIDI, MusicXML and more.

  Notation Python BSD-3-Clause Active 2026

• FluidSynth

  Stars: 2.5k

  FluidSynth/fluidsynth

  Real-time SoundFont 2 synthesizer: library, CLI, and the reference open-source GM player.

  Synthesis C LGPL-2.1 Active 2026

• JACK2

  Stars: 2.5k

  jackaudio/jack2

  JACK Audio Connection Kit: low-latency audio and MIDI routing between applications.

  Realtime C++ GPL-2.0 Active 2026

• iPlug2

  Stars: 2.4k

  iPlug2/iPlug2

  Audio plugin framework for desktop, mobile, and web.

  DAW / Live C++ Other Active 2026

• Signal

  Stars: 2.4k

  ryohey/signal

  Full-featured online MIDI editor and sequencer that runs in the browser.

  Web TypeScript MIT Active 2026

• Plugdata

  Stars: 2.4k

  plugdata-team/plugdata

  Pure Data as a plugin with a modern UI and MIDI I/O.

  Synthesis C++ GPL-3.0 Active 2026

• abcjs

  Stars: 2.4k

  paulrosen/abcjs

  Renders ABC notation and plays it back via MIDI or Web Audio.

  Notation JavaScript Other Active 2026

• CLAP

  Stars: 2.4k

  free-audio/clap

  Open audio plugin API with first-class note expressions and MIDI 2.0 support.

  DAW / Live C MIT Active 2026

• openDAW

  Stars: 2.3k

  andremichelle/openDAW

  Open-source, browser-based DAW with MIDI support.

  Web TypeScript AGPL-3.0 Active 2026

• Carla

  Stars: 2.2k

  falkTX/Carla

  Fully-featured audio plugin host with MIDI routing.

  DAW / Live C++ Active 2026

• Vital

  Stars: 2.2k

  mtytel/vital

  Spectral warping wavetable synthesizer (source release).

  Synthesis C++ GPL-3.0 Active 2023

• Magenta.js

  Stars: 2.1k

  magenta/magenta-js

  Music and art generation models running in the browser.

  ML TypeScript Apache-2.0 Active 2026

• MilkyTracker

  Stars: 2.1k

  milkytracker/MilkyTracker

  FastTracker II-inspired music tracker with MIDI input.

  DAW / Live C++ Other Active 2026

• Pure Data

  Stars: 2.1k

  pure-data/pure-data

  Visual programming language for interactive audio and MIDI.

  Synthesis C Other Active 2026

• Giada

  Stars: 2.1k

  monocasual/giada

  Minimal live-looping tool with MIDI learn.

  DAW / Live C++ GPL-3.0 Active 2026

• ossia score

  Stars: 2.1k

  ossia/score

  Intermedia sequencer for MIDI, OSC, audio, and more.

  DAW / Live C++ Other Active 2026

• MuseGAN

  Stars: 2.0k

  salu133445/musegan

  Multi-track symbolic music generation with GANs.

  ML Python MIT Active 2024

• Omnizart

  Stars: 2.0k

  Music-and-Culture-Technology-Lab/omnizart

  Automatic music transcription for piano, drums, vocals, and chords.

  ML Python MIT Active 2026

• OpenSheetMusicDisplay

  Stars: 2.0k

  opensheetmusicdisplay/opensheetmusicdisplay

  Renders MusicXML sheet music in the browser.

  Notation TypeScript BSD-3-Clause Active 2026

• GridSound

  Stars: 1.9k

  gridsound/daw

  Open-source DAW that runs in the browser.

  Web JavaScript AGPL-3.0 Active 2026

• alphaTab

  Stars: 1.9k

  CoderLine/alphaTab

  Guitar tablature and notation rendering with built-in SoundFont playback.

  Notation TypeScript Other Active 2026

• Arduino MIDI Library

  Stars: 1.8k

  FortySevenEffects/arduino_midi_library

  The standard MIDI I/O library for Arduino serial MIDI.

  Hardware C++ MIT Active 2023

• MT3

  Stars: 1.8k

  magenta/mt3

  Multi-task, multitrack music transcription (audio to MIDI).

  ML Python Apache-2.0 Active 2026

• Element

  Stars: 1.7k

  kushview/element

  Modular audio plugin host with MIDI routing.

  DAW / Live C++ Active 2026

• WEBMIDI.js

  Stars: 1.7k

  djipco/webmidi

  Friendly wrapper for the Web MIDI API: named notes, channels, and events.

  Web JavaScript Apache-2.0 Active 2026

• Chataigne

  Stars: 1.7k

  benkuper/Chataigne

  Show-control software bridging MIDI, OSC, DMX, and more.

  DAW / Live C++ GPL-3.0 Active 2026

• Control Surface

  Stars: 1.7k

  tttapa/Control-Surface

  Arduino library for building MIDI controllers: buttons, pots, encoders, displays.

  Hardware C++ GPL-3.0 Active 2026

• mido

  Stars: 1.6k

  mido/mido

  Pythonic MIDI messages, ports, and Standard MIDI File reading/writing.

  SMF Python MIT Active 2026

• Schism Tracker

  Stars: 1.6k

  schismtracker/schismtracker

  Impulse Tracker clone with MIDI in/out.

  DAW / Live C GPL-2.0 Active 2026

• Neothesia

  Stars: 1.6k

  PolyMeilex/Neothesia

  Flashy Synthesia-like piano visualizer and learning tool.

  Utilities Rust GPL-3.0 Active 2026

• TuxGuitar

  Stars: 1.6k

  helge17/tuxguitar

  Multitrack tablature editor and player with MIDI support.

  Notation Java Active 2026

• python-midi

  Stars: 1.6k

  vishnubob/python-midi

  Classic low-level Python toolkit for reading and writing MIDI files.

  SMF Python MIT Active 2026

• Csound

  Stars: 1.5k

  csound/csound

  Sound and music computing system with deep MIDI integration.

  Synthesis C LGPL-2.1 Active 2026

• musicpy

  Stars: 1.5k

  Rainbow-Dreamer/musicpy

  Music-theory-aware language for writing and analysing music that reads and writes MIDI.

  SMF Python LGPL-2.1 Active 2026

• Tracktion Engine

  Stars: 1.5k

  Tracktion/tracktion_engine

  High-level JUCE module for building sequencer and DAW apps.

  DAW / Live C++ Other Active 2026

• teoria

  Stars: 1.4k

  saebekassebil/teoria

  Music theory for JavaScript with MIDI note and frequency helpers.

  Notation JavaScript MIT Active 2019

• Ableton Link

  Stars: 1.3k

  Ableton/link

  Tempo, beat, and phase sync over a local network; a common companion to MIDI clock.

  Network C++ Other Active 2026

• Hydrogen

  Stars: 1.3k

  hydrogen-music/hydrogen

  Advanced drum machine with MIDI in/out.

  DAW / Live C++ GPL-2.0 Active 2026

• Mozzi

  Stars: 1.3k

  sensorium/Mozzi

  Sound synthesis library for Arduino and other microcontrollers.

  Synthesis C++ LGPL-2.1 Active 2026

• MIDIVisualizer

  Stars: 1.3k

  kosua20/MIDIVisualizer

  Small MIDI piano-roll visualizer, ready for video export.

  Utilities C++ MIT Active 2025

• DaisySP

  Stars: 1.3k

  daisyaudio/DaisySP

  Portable DSP library for building synths and effects on Daisy and beyond.

  Hardware C++ Other Active 2026

• RtMidi

  Stars: 1.2k

  thestk/rtmidi

  The classic cross-platform realtime MIDI I/O API (CoreMIDI, ALSA, JACK, WinMM).

  Realtime C++ Other Active 2026

• BeepBox

  Stars: 1.2k

  johnnesky/beepbox

  Online chiptune sketchpad with MIDI export.

  Web TypeScript MIT Active 2026

• ZynAddSubFX

  Stars: 1.2k

  zynaddsubfx/zynaddsubfx

  Fully featured open-source software synthesizer.

  Synthesis C++ GPL-2.0 Active 2026

• FoxDot

  Stars: 1.2k

  Qirky/FoxDot

  Live-coding environment in Python for SuperCollider and MIDI.

  DAW / Live Python Other Active 2025

• LUFA

  Stars: 1.1k

  abcminiuser/lufa

  USB framework for AVR microcontrollers, with MIDI class drivers and demos.

  Hardware C Active 2026

• Radium

  Stars: 1.1k

  kmatheussen/radium

  Music editor with a tracker interface and MIDI support.

  DAW / Live C++ GPL-2.0 Active 2026

• ChucK

  Stars: 1.0k

  ccrma/chuck

  Strongly-timed music programming language with MIDI I/O.

  Synthesis C++ GPL-2.0 Active 2026

• pretty_midi

  Stars: 1.0k

  craffel/pretty-midi

  High-level MIDI analysis and manipulation: notes, instruments, piano rolls, and synthesis.

  SMF Python MIT Active 2026

• @tonejs/midi

  Stars: 1.0k

  Tonejs/Midi

  Convert MIDI files to and from a friendly JSON format in the browser or Node.

  SMF JavaScript MIT Active 2023

• webaudiofont

  Stars: 991

  surikov/webaudiofont

  Large GM-compatible instrument and drum library and player for Web Audio.

  Web JavaScript GPL-3.0 Active 2026

• Gibber

  Stars: 976

  gibber-cc/gibber

  Browser live-coding environment with Web MIDI output.

  Web JavaScript MIT Active 2024

• OpenDeck

  Stars: 957

  shanteacontrols/OpenDeck

  Firmware platform for building MIDI controllers, configurable from a web UI.

  Hardware C++ Apache-2.0 Active 2026

• Frescobaldi

  Stars: 954

  frescobaldi/frescobaldi

  LilyPond music score editor with MIDI playback.

  Notation Python GPL-2.0 Active 2026

• Verovio

  Stars: 943

  rism-digital/verovio

  Fast engraving library for MEI, MusicXML, Humdrum and ABC with MIDI output.

  Notation C++ LGPL-3.0 Active 2026

• python-mingus

  Stars: 928

  bspaans/python-mingus

  Music theory and notation package with MIDI and LilyPond output.

  Notation Python GPL-3.0 Active 2024

• html-midi-player

  Stars: 910

  cifkao/html-midi-player

  Web components for playing and visualizing MIDI files on any web page.

  Web JavaScript BSD-2-Clause Active 2025

• MidiTok

  Stars: 904

  Natooz/MidiTok

  MIDI tokenizers (REMI, CP Word, Octuple, MIDILike...) for sequence models.

  ML Python MIT Active 2026

• ShowMIDI

  Stars: 903

  gbevin/ShowMIDI

  Multi-platform GUI and plugin to visualize MIDI 1.0 and 2.0 activity at a glance.

  Utilities C++ GPL-3.0 Active 2026

• midifile

  Stars: 897

  craigsapp/midifile

  C++ classes for reading and writing Standard MIDI Files.

  SMF C++ BSD-2-Clause Active 2025

• pianoplayer

  Stars: 895

  marcomusy/pianoplayer

  Automatic piano fingering generator for MusicXML and MIDI.

  Notation Python MIT Active 2026

• TinySoundFont

  Stars: 887

  schellingb/TinySoundFont

  Single-header SoundFont2 synthesizer and MIDI file player.

  Synthesis C MIT Active 2026

• Stargate

  Stars: 880

  stargatedaw/stargate

  All-in-one DAW and plugin suite.

  DAW / Live C GPL-3.0 Active 2025

• DPF

  Stars: 874

  DISTRHO/DPF

  DISTRHO Plugin Framework for LV2, VST, CLAP, and JACK.

  DAW / Live C++ ISC Active 2026

• SendMIDI

  Stars: 852

  gbevin/SendMIDI

  Command-line tool to send MIDI messages to any MIDI output.

  Utilities C++ GPL-3.0 Active 2026

• midir

  Stars: 829

  Boddlnagg/midir

  Cross-platform realtime MIDI processing in Rust.

  Realtime Rust MIT Active 2026

• MIDIApps

  Stars: 823

  krevis/MIDIApps

  Source for MIDI Monitor and SysEx Librarian on macOS.

  Utilities Objective-C BSD-3-Clause Active 2026

• Odin 2

  Stars: 821

  TheWaveWarden/odin2

  Polyphonic synthesizer plugin with MPE support.

  Synthesis C++ Other Active 2025

• Munt

  Stars: 818

  munt/munt

  Roland MT-32, CM-32L, and LAPC-I synthesizer emulator.

  Synthesis C++ Active 2026

• MusE

  Stars: 807

  muse-sequencer/muse

  MIDI/audio sequencer with recording and editing capabilities.

  DAW / Live C++ Other Active 2026

• Calf Studio Gear

  Stars: 805

  calf-studio-gear/calf

  Audio plugin suite for Linux, including MIDI-driven synths.

  Synthesis C++ LGPL-2.1 Active 2026

• DrivenByMoss

  Stars: 805

  git-moss/DrivenByMoss

  Bitwig Studio extensions for many MIDI controllers (Push, APC, Launchpad, MCU…).

  DAW / Live Java LGPL-3.0 Active 2026

• midi-js-soundfonts

  Stars: 790

  gleitz/midi-js-soundfonts

  Pre-rendered General MIDI SoundFonts packaged for MIDI.js and the web.

  Web JavaScript MIT Active 2022

• OpenMPT

  Stars: 787

  OpenMPT/openmpt

  Tracker and MIDI-capable module editor (official mirror).

  DAW / Live C++ BSD-3-Clause Active 2026

• MIDI2LR

  Stars: 775

  rsjaffe/MIDI2LR

  Control Adobe Lightroom Classic from MIDI controllers.

  Utilities C++ GPL-3.0 Active 2026

• node-midi

  Stars: 760

  justinlatimer/node-midi

  Node.js wrapper around RtMidi for realtime MIDI ports.

  Realtime JavaScript MIT Active 2022

• norns

  Stars: 734

  monome/norns

  Sound computer platform with Lua scripting and MIDI device support.

  DAW / Live Lua GPL-3.0 Active 2026

• MidiJack

  Stars: 730

  keijiro/MidiJack

  MIDI input plugin for Unity.

  Realtime C# Active 2020

• Edisyn

  Stars: 722

  eclab/edisyn

  Synthesizer patch editor and librarian supporting many hardware synths.

  Editors Java Apache-2.0 Active 2026

• Minis

  Stars: 721

  keijiro/Minis

  MIDI input via the Unity Input System.

  Realtime C# Other Active 2025

• libremidi

  Stars: 712

  celtera/libremidi

  Modern C++20 MIDI 1.0 and MIDI 2.0 realtime and file I/O library.

  Realtime C++ Other Active 2026

• DryWetMIDI

  Stars: 704

  melanchall/drywetmidi

  Comprehensive .NET library for MIDI files, devices, playback, and recording.

  SMF C# MIT Active 2026

• Windows MIDI Services

  Stars: 692

  microsoft/MIDI

  Microsoft's next-generation Windows MIDI stack with MIDI 2.0 and UMP.

  MIDI 2.0 C++ MIT Active 2026

• LilyPond

  Stars: 688

  lilypond/lilypond

  Text-based music engraving that can also output MIDI.

  Notation C++ Other Active 2026

• Ctrlr

  Stars: 684

  RomanKubiak/ctrlr

  Build custom editors and panels for any MIDI hardware.

  Editors C++ BSD-3-Clause Active 2024

• Adafruit TinyUSB Arduino

  Stars: 651

  adafruit/Adafruit_TinyUSB_Arduino

  TinyUSB for Arduino cores, enabling USB-MIDI on RP2040, SAMD, nRF52, ESP32-S2/S3.

  Hardware C++ MIT Active 2026

• PedalinoMini

  Stars: 622

  alf45tar/PedalinoMini

  ESP32 foot controller firmware with USB, DIN, BLE-MIDI, RTP-MIDI, and OSC support.

  Hardware C++ Active 2026

• MusicXML

  Stars: 611

  w3c-cg/musicxml

  The W3C MusicXML specification source.

  Notation XML Active 2026

• MidiWriterJS

  Stars: 608

  grimmdude/MidiWriterJS

  Fluent API for generating multi-track MIDI files in JavaScript.

  SMF JavaScript MIT Active 2026

• Qtractor

  Stars: 607

  rncbc/qtractor

  Audio/MIDI multi-track sequencer for Linux.

  DAW / Live C++ GPL-2.0 Active 2026

• REMI

  Stars: 606

  YatingMusic/remi

  Pop Music Transformer and the REMI event representation.

  ML Python GPL-3.0 Active 2022

• MIDIMonster

  Stars: 606

  cbdevnet/midimonster

  Translates between MIDI, OSC, ArtNet, sACN, and more.

  Utilities C BSD-2-Clause Active 2024

• JJazzLab

  Stars: 602

  jjazzboss/JJazzLab

  Application for generating MIDI backing tracks from chord charts.

  DAW / Live Java LGPL-2.1 Active 2026

• JZZ

  Stars: 595

  jazz-soft/JZZ

  MIDI library for Node.js and browsers with Web MIDI polyfill and MIDI 2.0 support.

  Web JavaScript MIT Active 2026

• PianoBooster

  Stars: 584

  pianobooster/PianoBooster

  Interactive piano learning that plays along with MIDI files.

  Utilities C++ Other Active 2024

• Teensy cores

  Stars: 578

  PaulStoffregen/cores

  Teensy core libraries, including the usbMIDI device implementation.

  Hardware C Active 2026

• MIDIUSB

  Stars: 573

  arduino-libraries/MIDIUSB

  Native USB-MIDI device support for Arduino boards with USB (32u4, SAMD, etc.).

  Hardware C++ LGPL-2.1 Active 2026

• MidiEditor

  Stars: 565

  markusschwenk/midieditor

  Free MIDI file editor for recording, editing, and playback.

  Utilities C++ GPL-3.0 Active 2024

• MusicAutobot

  Stars: 551

  bearpelican/musicautobot

  Transformer-based music generation and harmonization on MIDI.

  ML Python MIT Active 2021

• Bela

  Stars: 540

  BelaPlatform/Bela

  Ultra-low-latency audio and sensor platform with MIDI support.

  Hardware C++ Other Active 2026

• ORCA (C)

  Stars: 538

  hundredrabbits/Orca-c

  Terminal version of the ORCA live-coding grid with MIDI output.

  DAW / Live C MIT Active 2025

• ADLplug

  Stars: 532

  jpcima/ADLplug

  FM chip synthesizer plugin (OPL3/OPN2) built on libADLMIDI.

  Synthesis C++ BSL-1.0 Active 2023

• DaisyExamples

  Stars: 529

  daisyaudio/DaisyExamples

  Example projects for the Daisy platform, including MIDI.

  Hardware C++ MIT Active 2026

• MusPy

  Stars: 525

  salu133445/muspy

  Toolkit for symbolic music generation: datasets, representations, and metrics.

  ML Python MIT Active 2026

• amsynth

  Stars: 506

  amsynth/amsynth

  Analog-modelling software synthesizer.

  Synthesis C++ GPL-2.0 Active 2026

• NES Music Database

  Stars: 505

  chrisdonahue/nesmdb

  Dataset of NES game music with MIDI and score formats plus conversion tooling.

  Datasets Python MIT Active 2024

• MIKMIDI

  Stars: 504

  mixedinkey-opensource/MIKMIDI

  CoreMIDI wrapper for Swift and Objective-C with device I/O, sequencing, and MIDI file support.

  Realtime Objective-C Other Active 2026

• alsa-lib

  Stars: 499

  alsa-project/alsa-lib

  ALSA userspace library, including the Linux sequencer and rawmidi APIs.

  Realtime C LGPL-2.1 Active 2026

• Axoloti

  Stars: 495

  axoloti/axoloti

  Patcher and firmware for a standalone digital audio/MIDI board.

  Hardware Java GPL-3.0 Active 2020

• libDaisy

  Stars: 484

  daisyaudio/libDaisy

  Hardware abstraction library for the Daisy audio platform, with MIDI handlers.

  Hardware C++ MIT Active 2026

• Polyphone

  Stars: 480

  davy7125/polyphone

  SoundFont (sf2/sf3/sfz) editor.

  Editors C++ GPL-3.0 Active 2026

• MIDI2CV

  Stars: 472

  elkayem/midi2cv

  Arduino-based MIDI to CV/gate converter.

  Hardware C++ GPL-3.0 Active 2018

• MidiAnimationTrack

  Stars: 467

  keijiro/MidiAnimationTrack

  Unity Timeline track that plays MIDI files as animation.

  DAW / Live C# Unlicense Active 2022

• Transkun

  Stars: 459

  Yujia-Yan/Transkun

  Piano transcription with pedal and velocity, audio to MIDI.

  ML Python MIT Active 2024

• isobar

  Stars: 439

  ideoforms/isobar

  Algorithmic composition and pattern sequencing over MIDI and OSC.

  DAW / Live Python MIT Active 2026

• midis2jam2

  Stars: 433

  wyskoj/midis2jam2

  3D MIDI file visualizer, a remaster of MIDIJam.

  Utilities Kotlin GPL-3.0 Active 2026

• Elektroid

  Stars: 425

  dagargo/elektroid

  Sample and preset transfer for Elektron devices and others over SysEx.

  Editors C GPL-3.0 Active 2026

• ReaScripts

  Stars: 422

  ReaTeam/ReaScripts

  Community script repository for REAPER, with many MIDI editing tools.

  DAW / Live Lua Active 2026

• python-rtmidi

  Stars: 413

  SpotlightKid/python-rtmidi

  Python bindings for RtMidi with a Pythonic API.

  Realtime Python Other Active 2026

• POP909

  Stars: 411

  music-x-lab/POP909-Dataset

  909 pop songs as piano arrangements with melody, chords, and beats.

  Datasets Python MIT Active 2020

• SpessaSynth

  Stars: 408

  spessasus/SpessaSynth

  SoundFont2/DLS synthesizer and MIDI player for the web.

  Web JavaScript Apache-2.0 Active 2026

• MidiPlayerJS

  Stars: 397

  grimmdude/MidiPlayerJS

  MIDI file player that emits events for each message as it plays.

  SMF JavaScript MIT Active 2026

• WebMIDIAPIShim

  Stars: 387

  cwilso/WebMIDIAPIShim

  Polyfill that bridges the Web MIDI API to plugins or native modules.

  Web JavaScript Active 2018

• 16n Faderbank

  Stars: 384

  16n-faderbank/16n

  Open-source 16-fader MIDI/CV/I2C controller (Teensy).

  Hardware C++ Other Active 2025

• Pencil Research MIDI database

  Stars: 384

  pencilresearch/midi

  Community database of MIDI CC and NRPN implementation charts for hardware synths and effects.

  Editors CSV CC-BY-SA-4.0 Active 2026

• ReceiveMIDI

  Stars: 379

  gbevin/ReceiveMIDI

  Command-line tool to monitor and log incoming MIDI.

  Utilities C++ GPL-3.0 Active 2026

• midi-model

  Stars: 378

  SkyTNT/midi-model

  Transformer for MIDI event generation with a tokenizer and web UI.

  ML Python Apache-2.0 Active 2024

• Partitura

  Stars: 377

  CPJKU/partitura

  Symbolic music processing for MusicXML, MEI, and MIDI.

  Notation Python Apache-2.0 Active 2026

• webaudio-controls

  Stars: 372

  g200kg/webaudio-controls

  Knob, slider, switch, and keyboard web components with MIDI learn.

  Web JavaScript Apache-2.0 Active 2025

• gomidi

  Stars: 360

  gomidi/midi

  Modular MIDI library for Go: messages, SMF read/write, and pluggable realtime drivers.

  SMF Go MIT Active 2026

• LakhNES

  Stars: 357

  chrisdonahue/LakhNES

  Multi-instrument music generation pre-trained on Lakh MIDI.

  ML Python Active 2021

• ESP32-BLE-MIDI

  Stars: 354

  max22-/ESP32-BLE-MIDI

  BLE-MIDI host and client library for the ESP32.

  Network C++ MIT Active 2026

• picostepseq

  Stars: 352

  todbot/picostepseq

  MIDI step sequencer for the Raspberry Pi Pico.

  Hardware Python GPL-3.0 Active 2025

• MIDIKit

  Stars: 351

  orchetect/swift-midi

  Modern Swift CoreMIDI wrapper with MIDI 1.0 and 2.0 support.

  Realtime Swift MIT Active 2026

• Web MIDI API spec

  Stars: 341

  WebAudio/web-midi-api

  The W3C Web MIDI API specification source.

  Web Spec Other Active 2026

• Moppy2

  Stars: 331

  samphonic/Moppy2

  Play MIDI on floppy drives and other hardware ("Musical flOPPY controller").

  Hardware Java Other Active 2026

• Arduino-AppleMIDI-Library

  Stars: 328

  lathoub/Arduino-AppleMIDI-Library

  RTP-MIDI (AppleMIDI) over Ethernet and Wi-Fi for Arduino.

  Network C++ Other Active 2026

• smplr

  Stars: 327

  danigb/smplr

  Sampled instruments (piano, drums, SoundFonts) for Web Audio.

  Web TypeScript Active 2026

• Sardine

  Stars: 325

  Bubobubobubobubo/sardine

  Python live-coding library for MIDI, OSC, and SuperDirt.

  DAW / Live Python GPL-3.0 Active 2025

• polyrhythmix

  Stars: 309

  dredozubov/polyrhythmix

  Command-line polyrhythmic MIDI drum generator.

  DAW / Live Rust Unlicense Active 2023

• USB-MIDI-Driver

  Stars: 305

  kshoji/USB-MIDI-Driver

  USB MIDI host driver for Android (works without android.media.midi).

  Realtime Java Apache-2.0 Active 2026

• Arduino-BLE-MIDI

  Stars: 305

  lathoub/Arduino-BLE-MIDI

  BLE-MIDI transport for the Arduino MIDI Library (ESP32, nRF52, and more).

  Network C++ MIT Active 2026

• Tegridy MIDI Dataset

  Stars: 297

  asigalov61/Tegridy-MIDI-Dataset

  Curated MIDI datasets for symbolic music AI.

  Datasets Python Apache-2.0 Active 2026

• Yoshimi

  Stars: 292

  Yoshimi/yoshimi

  Software synthesizer derived from ZynAddSubFX.

  Synthesis C++ Other Active 2026

• KnobKraft Orm

  Stars: 292

  christofmuc/KnobKraft-orm

  Modern, cross-platform librarian for MIDI synthesizers.

  Editors C++ AGPL-3.0 Active 2026

• portmidi (Go)

  Stars: 290

  rakyll/portmidi

  Go bindings for PortMidi.

  Realtime Go Apache-2.0 Active 2022

• Luppp

  Stars: 288

  openAVproductions/openAV-Luppp

  Live-performance looping tool with MIDI controller support.

  DAW / Live C++ GPL-3.0 Active 2025

• miditoolkit

  Stars: 285

  YatingMusic/miditoolkit

  MIDI file toolkit with tick-level precision, piano-roll and chord utilities.

  SMF Python MIT Active 2024

• Bitwig extensions

  Stars: 282

  bitwig/bitwig-extensions

  Source of Bitwig Studio's official controller extensions.

  DAW / Live Java MIT Active 2026

• ASAP dataset

  Stars: 281

  fosfrancesco/asap-dataset

  Aligned scores and performances of classical piano music (MIDI and MusicXML).

  Datasets Python Other Active 2026

• Compound Word Transformer

  Stars: 280

  YatingMusic/compound-word-transformer

  Full-song symbolic music generation using compound-word tokens.

  ML Python GPL-3.0 Active 2023

• ReaLearn / Helgobox

  Stars: 278

  helgoboss/helgobox

  MIDI/OSC controller mapping for REAPER (ReaLearn).

  DAW / Live Rust GPL-3.0 Active 2026

• staff

  Stars: 275

  staff-rs/staff

  Music-theory and score-rendering library with MIDI support.

  Notation Rust MIT Active 2024

• MIDIUtil

  Stars: 272

  MarkCWirt/MIDIUtil

  Pure-Python library for writing multi-track MIDI files.

  SMF Python Other Active 2022

• webaudio-tinysynth

  Stars: 270

  g200kg/webaudio-tinysynth

  Tiny GM-compatible synthesizer built on Web Audio, with SMF playback.

  Web JavaScript Apache-2.0 Active 2022

• Abjad

  Stars: 267

  Abjad/abjad

  Python API for building LilyPond scores.

  Notation Python GPL-3.0 Active 2025

• android-midi-lib

  Stars: 265

  LeffelMania/android-midi-lib

  Lightweight library for reading, editing and writing MIDI files on Android/Java.

  SMF Java MIT Active 2020

• signls

  Stars: 265

  emprcl/signls

  Non-linear, generative MIDI sequencer in the terminal.

  DAW / Live Go MIT Active 2026

• uClock

  Stars: 264

  midilab/uClock

  Tight BPM clock generator for Arduino, Teensy, ESP32 and RP2040 with MIDI sync.

  Hardware C++ MIT Active 2026

• MusicTransformer-Pytorch

  Stars: 262

  gwinndr/MusicTransformer-Pytorch

  PyTorch reimplementation of Music Transformer.

  ML Python MIT Active 2022

• MIDIcontroller

  Stars: 257

  joshnishikawa/MIDIcontroller

  Library for building class-compliant MIDI controllers with Teensy.

  Hardware C++ Active 2026

• unimidi

  Stars: 256

  arirusso/unimidi

  Platform-independent realtime MIDI input and output for Ruby.

  Realtime Ruby Other Active 2022

• Sequencer64

  Stars: 255

  ahlstromcj/sequencer64

  Pattern-based live MIDI sequencer (predecessor of Seq66).

  DAW / Live C++ AGPL-3.0 Active 2024

• pyFluidSynth

  Stars: 253

  amberwhitehead/pyfluidsynth

  Python bindings for FluidSynth.

  Synthesis Python LGPL-2.1 Active 2026

• miditui

  Stars: 253

  minimaxir/miditui

  Interactive terminal UI for MIDI composing, mixing, and playback.

  DAW / Live Rust MIT Active 2026

• rtpmidid

  Stars: 252

  davidmoreno/rtpmidid

  RTP-MIDI (AppleMIDI) daemon for Linux that exposes peers as ALSA ports.

  Network C++ Other Active 2026

• alsa-utils

  Stars: 252

  alsa-project/alsa-utils

  ALSA command-line tools including aconnect, aseqdump, and amidi.

  Utilities C GPL-2.0 Active 2026

• VexFlow

  Stars: 247

  vexflow/vexflow

  Music notation and guitar tab rendering for the web.

  Notation TypeScript MIT Active 2026

• rust-jack

  Stars: 247

  RustAudio/rust-jack

  Rust bindings for JACK, with MIDI ports.

  Realtime Rust MIT Active 2026

• midi-parser-js

  Stars: 246

  colxi/midi-parser-js

  Parse MIDI files (from base64, ArrayBuffer, or file input) into JSON.

  SMF JavaScript GPL-3.0 Active 2023

• WildMIDI

  Stars: 245

  Mindwerks/wildmidi

  Software synthesizer library that plays MIDI with GUS patches.

  Synthesis C Other Active 2026

• libADLMIDI

  Stars: 238

  Wohlstand/libADLMIDI

  MIDI player library with OPL3 (FM) emulation.

  Synthesis C++ GPL-3.0 Active 2026

• jsmidgen

  Stars: 237

  dingram/jsmidgen

  Small library for generating MIDI files in JavaScript.

  SMF JavaScript Active 2025

• setBfree

  Stars: 235

  pantherb/setBfree

  DSP tonewheel organ with MIDI control.

  Synthesis C GPL-2.0 Active 2026

• Euterpea

  Stars: 234

  Euterpea/Euterpea2

  Haskell library for music composition with MIDI I/O.

  Notation Haskell Zlib Active 2025

• RustySynth

  Stars: 233

  sinshu/rustysynth

  SoundFont MIDI synthesizer written in pure Rust.

  Synthesis Rust Other Active 2026

• MNX

  Stars: 230

  w3c-cg/mnx

  W3C draft next-generation music notation format.

  Notation Spec Active 2026

• obs-midi-mg

  Stars: 230

  nhielost/obs-midi-mg

  OBS Studio plugin that binds MIDI messages to OBS actions and sends MIDI feedback.

  Utilities C++ GPL-2.0 Active 2026

• Apollo Studio

  Stars: 227

  mat1jaczyyy/apollo-studio

  Editor and live playback engine for MIDI-driven RGB light effects on Novation Launchpads.

  DAW / Live C# BSD-3-Clause Active 2026

• truce

  Stars: 225

  truce-audio/truce

  Cross-platform audio and MIDI plugin framework in Rust.

  DAW / Live Rust Other Active 2026

• Openthesia

  Stars: 224

  ImAxel0/Openthesia

  Falling-notes MIDI visualizer and piano practice tool for Windows.

  Utilities C# GPL-3.0 Active 2025

• QjackCtl

  Stars: 223

  rncbc/qjackctl

  JACK control panel and ALSA/JACK MIDI patchbay.

  Utilities C++ GPL-2.0 Active 2026

• MeltySynth

  Stars: 219

  sinshu/meltysynth

  SoundFont MIDI synthesizer for .NET with no dependencies.

  Synthesis C# Other Active 2026

• managed-midi

  Stars: 217

  atsushieno/managed-midi

  Cross-platform .NET MIDI device access and SMF support.

  Realtime C# MIT Active 2026

• Zynthian

  Stars: 216

  zynthian/zynthian-ui

  UI for the Zynthian open synth platform (Raspberry Pi based MIDI sound module).

  Hardware Python GPL-3.0 Active 2026

• Zenith MIDI

  Stars: 216

  arduano/Zenith-MIDI

  Fast GPU-based MIDI renderer for extremely dense ("black") MIDIs.

  Utilities C# Other Active 2023

• USBHost_t36

  Stars: 213

  PaulStoffregen/USBHost_t36

  USB host library for Teensy 3.6/4.x, including USB-MIDI host.

  Hardware C++ Active 2026

• Melrōse

  Stars: 213

  emicklei/melrose

  Interactive language for programming melodies that plays over MIDI.

  DAW / Live Go MIT Active 2026

• PortMidi

  Stars: 212

  PortMidi/portmidi

  Portable realtime MIDI I/O library used by many audio applications.

  Realtime C Other Active 2026

• Piano (Tone.js)

  Stars: 210

  tambien/Piano

  Multi-sampled Salamander grand piano for Tone.js with pedal and velocity.

  Web TypeScript MIT Active 2023

• USBMIDI (Blokas)

  Stars: 209

  BlokasLabs/USBMIDI

  USB MIDI device library for Arduino with a Serial-style API for reading and writing MIDI.

  Hardware C Other Active 2021

• Tonic

  Stars: 208

  AudioKit/Tonic

  Swift music-theory library: notes, intervals, chords, and keys.

  Notation Swift MIT Active 2026

• Arduino-USBMIDI

  Stars: 204

  lathoub/Arduino-USBMIDI

  USB-MIDI transport for the Arduino MIDI Library.

  Hardware C++ MIT Active 2022

• Anticipatory Music Transformer

  Stars: 203

  jthickstun/anticipation

  Controllable symbolic-music generation with anticipation.

  ML Python Apache-2.0 Active 2026

• midly

  Stars: 199

  kovaxis/midly

  Fast, zero-allocation-capable MIDI file and stream parser for Rust (no_std friendly).

  SMF Rust Unlicense Active 2024

• midi2usbhost

  Stars: 199

  rppicomidi/midi2usbhost

  Raspberry Pi Pico bridge from a USB-MIDI device to a serial MIDI port.

  Hardware C MIT Active 2026

• MIDI Jar

  Stars: 199

  la-jarre-a-son/midi-jar

  Desktop toolbox for routing MIDI between devices and displaying played notes and chords.

  Utilities TypeScript MIT Active 2024

• easymidi

  Stars: 196

  dinchak/node-easymidi

  Simple event-based MIDI messaging for Node.js.

  Realtime JavaScript MIT Active 2026

• musicaiz

  Stars: 193

  carlosholivan/musicaiz

  Symbolic music generation, evaluation and analysis framework.

  ML Python AGPL-3.0 Active 2023

• Seq66

  Stars: 192

  ahlstromcj/seq66

  Live-looping, pattern-based MIDI sequencer.

  DAW / Live C++ Active 2026

• mididriver

  Stars: 191

  billthefarmer/mididriver

  Android MIDI driver using the Sonivox EAS synthesizer.

  Realtime Java Active 2026

• symusic

  Stars: 189

  Yikai-Liao/symusic

  Very fast MIDI file parsing and processing with a C++ core and Python bindings.

  SMF C++ / Python MIT Active 2026

• midilib

  Stars: 188

  jimm/midilib

  Pure-Ruby MIDI file and event manipulation library.

  SMF Ruby Active 2025

• The MidiBus

  Stars: 188

  sparks/themidibus

  Simple MIDI library for Processing.

  Realtime Java LGPL-3.0 Active 2026

• GeneralUser GS

  Stars: 184

  mrbumpy409/GeneralUser-GS

  Compact, freely licensed GM/GS SoundFont bank.

  Synthesis SoundFont Active 2026

• miti

  Stars: 184

  schollz/miti

  Musical instrument textual interface: write MIDI sequences as text.

  DAW / Live Go MIT Active 2020

• raveloxmidi

  Stars: 183

  ravelox/pimidi

  RTP-MIDI network service for Linux and Raspberry Pi.

  Network C Active 2026

• Sushi

  Stars: 182

  elk-audio/sushi

  Headless plugin host for embedded Linux with MIDI and OSC control.

  DAW / Live C++ Other Active 2026

• obs-midi

  Stars: 181

  cpyarger/obs-midi

  Control OBS Studio with MIDI devices.

  Utilities C++ GPL-2.0 Active 2022

• Lakh MIDI tools

  Stars: 177

  craffel/midi-dataset

  Code behind the Lakh MIDI Dataset: matching and aligning MIDI to audio.

  Datasets Python Active 2018

• Sanford.Multimedia.Midi

  Stars: 176

  tebjan/Sanford.Multimedia.Midi

  .NET toolkit for MIDI files, sequencing, and device I/O.

  SMF C# MIT Active 2026

• EMOPIA

  Stars: 175

  annahung31/EMOPIA

  Emotion-conditioned piano MIDI generation code accompanying the EMOPIA dataset.

  ML Python MIT Active 2022

• OPL3 Bank Editor

  Stars: 174

  Wohlstand/OPL3BankEditor

  Editor for OPL3 FM banks with MIDI playback.

  Editors C++ GPL-3.0 Active 2026

• android-midisuite

  Stars: 167

  philburk/android-midisuite

  Android MIDI test programs and examples (MIDI keyboard, scope, synth).

  Utilities Java Apache-2.0 Active 2026

• Keyboard (AudioKit)

  Stars: 165

  AudioKit/Keyboard

  SwiftUI piano keyboard with MIDI-friendly layouts.

  Notation Swift MIT Active 2026

• alsa-rs

  Stars: 163

  diwic/alsa-rs

  Rust bindings for ALSA, including the sequencer and rawmidi APIs.

  Realtime Rust Apache-2.0 Active 2026

• USBH_MIDI

  Stars: 163

  YuuichiAkagawa/USBH_MIDI

  USB MIDI class driver for the Arduino USB Host Shield 2.0 library.

  Hardware C++ GPL-2.0 Active 2022

• USBMidiKliK4x4

  Stars: 160

  TheKikGen/USBMidiKliK4x4

  Firmware for a multi-port USB-MIDI interface on STM32 "Blue Pill" boards.

  Hardware C Active 2026

• midi-file

  Stars: 158

  carter-thaxton/midi-file

  Small, dependency-free MIDI file parser and writer for Node and browsers.

  SMF JavaScript MIT Active 2026

• SysEx Controls

  Stars: 158

  soyersoyer/sysex-controls

  Linux GTK app that reads and writes controller mappings on Akai, Arturia, and Korg devices over SysEx.

  Editors C GPL-3.0 Active 2026

• MetaMIDI Dataset

  Stars: 157

  jeffreyjohnens/MetaMIDIDataset

  Large MIDI collection with metadata matched to audio and MusicBrainz.

  Datasets Python Active 2021

• PDMX

  Stars: 157

  pnlong/PDMX

  Public-domain MusicXML dataset for symbolic music processing.

  Datasets Python MIT Active 2026

• Multitrack Music Transformer

  Stars: 155

  salu133445/mmt

  Multitrack symbolic music generation.

  ML Python MIT Active 2024

• SCAMP

  Stars: 154

  MarcTheSpark/scamp

  Composition framework that plays via SoundFonts/MIDI and exports notation.

  Notation Python GPL-3.0 Active 2026

• WebMIDIKit

  Stars: 154

  adamnemecek/WebMIDIKit

  Swift CoreMIDI library modeled on the Web MIDI API.

  Realtime Swift MIT Active 2023

• Nottingham dataset

  Stars: 150

  jukedeck/nottingham-dataset

  Cleaned Nottingham folk-tune dataset with MIDI.

  Datasets ABC GPL-3.0 Active 2017

• pypianoroll

  Stars: 148

  salu133445/pypianoroll

  Multitrack piano-roll representation with MIDI I/O and visualization.

  SMF Python MIT Active 2023

• AAP (Android Audio Plugin)

  Stars: 140

  atsushieno/aap-core

  Audio plugin format and framework for Android that uses MIDI 2.0 UMP for events.

  MIDI 2.0 C++ MIT Active 2026

• micromidi

  Stars: 138

  arirusso/micromidi

  Ruby DSL for live MIDI messaging and scripting.

  Realtime Ruby Other Active 2024

• Midica

  Stars: 135

  truj/midica

  Music programming language that compiles to MIDI, with a player.

  DAW / Live Java MPL-2.0 Active 2025

• BLE-MIDI for Android

  Stars: 134

  kshoji/BLE-MIDI-for-Android

  BLE MIDI central and peripheral implementation for Android.

  Network Java Apache-2.0 Active 2026

• midi2audio

  Stars: 134

  bzamecnik/midi2audio

  Render MIDI to audio with FluidSynth from Python or the command line.

  Synthesis Python MIT Active 2022

• Symbolic music datasets

  Stars: 134

  wayne391/symbolic-music-datasets

  Curated list of symbolic music datasets.

  Datasets Markdown Active 2020

• midi-json-parser

  Stars: 133

  chrisguttandin/midi-json-parser

  Parses MIDI files into JSON, running the work in a Web Worker.

  SMF TypeScript MIT Active 2026

• osmd-audio-player

  Stars: 133

  jimutt/osmd-audio-player

  Playback for OpenSheetMusicDisplay scores.

  Notation TypeScript MIT Active 2023

• midi-sounds-react

  Stars: 131

  surikov/midi-sounds-react

  React component for playing MIDI instruments with WebAudioFont.

  Web JavaScript MIT Active 2018

• libOPNMIDI

  Stars: 130

  Wohlstand/libOPNMIDI

  MIDI player library with OPN2 (YM2612) FM emulation.

  Synthesis C++ LGPL-3.0 Active 2026

• midi2vjoy

  Stars: 130

  c0redumb/midi2vjoy

  Maps MIDI controller input to vJoy virtual joystick axes and buttons on Windows.

  Utilities Python BSD-2-Clause Active 2024

• ESP32_Host_MIDI

  Stars: 129

  sauloverissimo/ESP32_Host_MIDI

  MIDI 1.0 and 2.0 host transports for ESP32 (USB host, BLE, and more) for Arduino and ESP-IDF.

  MIDI 2.0 C++ Other Active 2026

• Reaticulate

  Stars: 128

  jtackaberry/reaticulate

  Articulation management for orchestral libraries in REAPER.

  DAW / Live Lua Other Active 2026

• drumscript

  Stars: 122

  tepreece/drumscript

  Text scripting language for programming MIDI drum machine patterns.

  DAW / Live Go MIT Active 2022

• flutter_midi_command

  Stars: 121

  InvisibleWrench/FlutterMidiCommand

  Flutter plugin for MIDI over USB and BLE on iOS, Android, macOS, and Linux.

  Realtime Dart BSD-3-Clause Active 2026

• usb_midi_host

  Stars: 119

  rppicomidi/usb_midi_host

  USB-MIDI host driver for TinyUSB on the Raspberry Pi Pico (RP2040).

  Hardware C MIT Active 2025

• Aria

  Stars: 119

  EleutherAI/aria

  Pretrained autoregressive piano model on symbolic MIDI.

  ML Python Apache-2.0 Active 2026

• tegridy-tools

  Stars: 117

  asigalov61/tegridy-tools

  Symbolic-music AI tools including the TMIDIX MIDI processing module.

  ML Python Apache-2.0 Active 2026

• JSB Chorales

  Stars: 115

  czhuang/JSB-Chorales-dataset

  Bach chorales dataset in pickled and JSON form for sequence modelling.

  Datasets Python Active 2022

• mpd-utils

  Stars: 114

  mungewell/mpd-utils

  Scripts that read and write Akai MPD218 pad controller presets via SysEx.

  Editors Python GPL-2.0 Active 2025

• webaudio-pianoroll

  Stars: 111

  g200kg/webaudio-pianoroll

  Piano-roll editor web component for displaying and editing MIDI-style note sequences.

  Web JavaScript Apache-2.0 Active 2024

• BMC (Badass MIDI Controller)

  Stars: 109

  neroroxxx/BMC

  Teensy and ESP32 library for building configurable MIDI controllers with a companion editor.

  Hardware C Other Active 2025

• esp32_usb_midi

  Stars: 108

  marcel-licence/esp32_usb_midi

  USB MIDI add-on that connects ESP32 synthesizer projects to USB hosts.

  Hardware C++ GPL-3.0 Active 2023

• USBMidiKliK

  Stars: 107

  TheKikGen/USBMidiKliK

  Firmware turning cheap USB-MIDI cables into robust MIDI interfaces.

  Hardware C Active 2023

• MIDI2ScoreTransformer

  Stars: 106

  TimFelixBeyer/MIDI2ScoreTransformer

  End-to-end piano performance-MIDI to score (MusicXML) conversion (ISMIR 2024).

  Notation Python Active 2024

• ktmidi

  Stars: 104

  atsushieno/ktmidi

  Kotlin Multiplatform MIDI 1.0/2.0 library with UMP and MIDI-CI.

  MIDI 2.0 Kotlin MIT Active 2026

• orca (norns)

  Stars: 102

  itsyourbedtime/orca

  Lua port of ORCA for monome norns, with MIDI output.

  DAW / Live Lua Active 2023

• Aria-MIDI

  Stars: 101

  loubbrad/aria-midi

  Dataset of about 1.2 million solo-piano MIDI files transcribed from recordings.

  Datasets Markdown Other Active 2025

• Pigiron

  Stars: 98

  plewto/Pigiron

  MIDI routing utility controlled over OSC.

  Utilities Go MIT Active 2023

• MIOS32

  Stars: 95

  midibox/mios32

  MIDIbox operating system for STM32/LPC microcontrollers.

  Hardware C Active 2026

• midi-box-stm32

  Stars: 95

  Hypnotriod/midi-box-stm32

  USB MIDI device driver and demo application for STM32 microcontrollers.

  Hardware C BSD-2-Clause Active 2025

• GigaMIDI

  Stars: 94

  Metacreation-Lab/GigaMIDI-Dataset

  Very large MIDI dataset with expressive-performance annotations.

  Datasets Python Other Active 2026

• node-rtpmidi

  Stars: 93

  jdachtera/node-rtpmidi

  RTP-MIDI / AppleMIDI implementation for Node.js.

  Network JavaScript Active 2022

• sektron

  Stars: 92

  emprcl/sektron

  Terminal MIDI step sequencer for live performance.

  DAW / Live Go MIT Active 2024

• midi-grid

  Stars: 92

  zukaitis/midi-grid

  Open hardware and STM32 firmware for a DIY RGB grid USB MIDI controller.

  Hardware C++ Other Active 2025

• IEMidi

  Stars: 91

  Interactive-Echoes/IEMidi

  Cross-platform editor for building MIDI mappings for arbitrary controllers.

  Utilities C++ Other Active 2025

• MVMNT

  Stars: 90

  Maokus/MVMNT

  Music visualization app and framework that renders animated scenes from MIDI files.

  Utilities TypeScript AGPL-3.0 Active 2026

• MidiParser

  Stars: 90

  matsune/MidiParser

  Reads and writes Standard MIDI Files in Swift for iOS and macOS.

  SMF Swift MIT Active 2026

• Giant Music Transformer

  Stars: 89

  asigalov61/Giant-Music-Transformer

  Large multi-instrument symbolic music transformer.

  ML Python Apache-2.0 Active 2024

• MIDI 2.0 Workbench

  Stars: 87

  midi2-dev/MIDI2.0Workbench

  Testing and development tool for MIDI 2.0 and MIDI-CI devices.

  MIDI 2.0 JavaScript MIT Active 2026

• coremidi (Rust)

  Stars: 87

  chris-zen/coremidi

  Safe Rust bindings for Apple's CoreMIDI.

  Realtime Rust MIT Active 2026

• PM2S

  Stars: 87

  cheriell/PM2S

  Performance-MIDI-to-score conversion with deep learning (beats, key, time signature).

  Notation Python MIT Active 2024

• ZiggySynth

  Stars: 87

  sinshu/ziggysynth

  SoundFont MIDI synthesizer written in pure Zig.

  Synthesis Zig Other Active 2026

• Lakh Pianoroll Dataset

  Stars: 87

  salu133445/lakh-pianoroll-dataset

  Multitrack piano-roll versions of the Lakh MIDI Dataset with conversion scripts.

  Datasets Python MIT Active 2025

• rimd

  Stars: 84

  RustAudio/rimd

  Rust library for reading, writing, and manipulating MIDI files.

  SMF Rust MIT Active 2021

• Mididash

  Stars: 84

  tiagolr/mididash

  Node-based desktop MIDI router with Lua scripting for filtering and transforming messages.

  Utilities Vue GPL-3.0 Active 2026

• Gong

  Stars: 84

  dclelland/Gong

  Swift wrapper around CoreMIDI for sending and receiving MIDI on iOS and macOS.

  Realtime Swift MIT Active 2022

• x42 MIDI filters

  Stars: 82

  x42/midifilter.lv2

  Collection of LV2 MIDI filter plugins.

  Utilities C GPL-2.0 Active 2026

• VMPK

  Stars: 81

  pedrolcl/VMPK

  Virtual MIDI Piano Keyboard.

  Utilities C++ GPL-3.0 Active 2026

• musictheory (Go)

  Stars: 81

  brettbuddin/musictheory

  Music-theory concepts (intervals, scales, chords) in Go.

  Notation Go MIT Active 2026

• OSC_MIDI_OSC

  Stars: 81

  fred-dev/OSC_MIDI_OSC

  Cross-platform desktop app that converts OSC messages to MIDI and MIDI back to OSC.

  Network C++ Active 2026

• go-meltysynth

  Stars: 80

  sinshu/go-meltysynth

  SoundFont MIDI synthesizer written in pure Go.

  Synthesis Go Other Active 2023

• VGMIDI

  Stars: 80

  lucasnfe/vgmidi

  Piano MIDI arrangements of video game music labeled for sentiment.

  Datasets Python Active 2022

• Beat Pads

  Stars: 80

  anzbert/beat_pads

  Flutter app that turns phones and tablets into USB or Bluetooth MIDI and MPE pad controllers.

  DAW / Live Dart GPL-3.0 Active 2026

• javax.sound.midi for Android

  Stars: 79

  kshoji/javax.sound.midi-for-Android

  javax.sound.midi API implementation for Android.

  Realtime Java Apache-2.0 Active 2024

• js-synthesizer

  Stars: 78

  jet2jet/js-synthesizer

  FluidSynth compiled to WebAssembly with an AudioWorklet player.

  Web TypeScript BSD-3-Clause Active 2026

• abcMIDI

  Stars: 78

  sshlien/abcmidi

  abc2midi, midi2abc, and related tools for converting between ABC and MIDI.

  Notation C Active 2026

• Slakh utils

  Stars: 77

  ethman/slakh-utils

  Utilities for Slakh2100, multitrack audio synthesized from Lakh MIDI.

  Datasets Python MIT Active 2024

• Pagan

  Stars: 75

  quintinfsmith/pagan

  Music sequencer for Android.

  DAW / Live Kotlin GPL-3.0 Active 2026

• meico

  Stars: 75

  cemfi/meico

  Converter framework between MEI, MSM, MPM, and MIDI, with audio rendering.

  Notation Java GPL-3.0 Active 2026

• Karya

  Stars: 73

  elaforge/karya

  Haskell music sequencer with a score language that renders to MIDI and other backends.

  DAW / Live Haskell GPL-3.0 Active 2026

• AM_MIDI2.0Lib

  Stars: 72

  midi2-dev/AM_MIDI2.0Lib

  MIDI 2.0 UMP and MIDI-CI library for embedded and desktop.

  MIDI 2.0 C++ MIT Active 2026

• libanalogrytm

  Stars: 71

  bsp2/libanalogrytm

  Portable library to decode, modify, and encode Elektron Analog Rytm SysEx dumps.

  Editors C MIT Active 2023

• Seq

  Stars: 71

  eclab/seq

  Modular, hierarchical MIDI sequencer from the author of Edisyn.

  DAW / Live Java Apache-2.0 Active 2026

• pico-usb-midi-processor

  Stars: 70

  rppicomidi/pico-usb-midi-processor

  Raspberry Pi Pico USB-MIDI pass-through processor with configurable transforms.

  Hardware C MIT Active 2026

• Los Angeles MIDI Dataset

  Stars: 70

  asigalov61/Los-Angeles-MIDI-Dataset

  Large deduplicated MIDI dataset with metadata and tooling.

  Datasets Python Apache-2.0 Active 2024

• midigrid

  Stars: 70

  miker2049/midigrid

  Use MIDI grid controllers (e.g. Launchpad) as monome grids on norns.

  Utilities Lua GPL-3.0 Active 2021

• spessasynth_core

  Stars: 69

  spessasus/spessasynth_core

  Environment-agnostic MIDI sequencer, parser, and SoundFont/DLS synth core behind SpessaSynth.

  Web TypeScript Apache-2.0 Active 2026

• ADL Piano MIDI

  Stars: 69

  lucasnfe/adl-piano-midi

  Piano MIDI files organized by genre, sub-genre, and artist.

  Datasets Python Active 2020

• cmidi2

  Stars: 68

  atsushieno/cmidi2

  Header-only MIDI 2.0 UMP and MIDI-CI library in C.

  MIDI 2.0 C MIT Active 2026

• JDTools

  Stars: 68

  sagamusix/JDTools

  Converts Roland JD-800 and JD-990 patch SysEx dumps between formats, including JD-08 files.

  Editors C Other Active 2024

• MidiExplorer

  Stars: 67

  EMATech/MidiExplorer

  MIDI monitor, analyzer, and debugger with a GUI built on mido and Dear PyGui.

  Utilities Python GPL-3.0 Active 2025

• MIDI.jl

  Stars: 66

  JuliaMusic/MIDI.jl

  Read, write, and manipulate MIDI files in Julia.

  SMF Julia MIT Active 2024

• Organelle OS

  Stars: 66

  critterandguitari/Organelle_OS

  Operating system for the Organelle Pd-based instrument.

  Hardware C Other Active 2026

• Swami

  Stars: 64

  swami/swami

  Instrument patch editor for SoundFont files.

  Editors C Other Active 2023

• usbd-midi

  Stars: 63

  rust-embedded-community/usbd-midi

  USB-MIDI device class for embedded Rust (usb-device).

  Hardware Rust MIT Active 2026

• Renoise tools

  Stars: 63

  renoise/xrnx

  Official Renoise Lua tools and API docs, including MIDI utilities.

  DAW / Live Lua MIT Active 2026

• CoreMidi4J

  Stars: 63

  DerekCook/CoreMidi4J

  Java Sound provider that exposes CoreMIDI devices with working SysEx on macOS.

  Realtime Java EPL-1.0 Active 2025

• LuaMidi

  Stars: 62

  PedroAlvesV/LuaMidi

  Pure-Lua library for reading and writing MIDI files.

  SMF Lua MIT Active 2020

• midish

  Stars: 61

  ratchov/midish

  Command-line MIDI sequencer and filter.

  Utilities C Active 2026

• Humdrum tools

  Stars: 61

  humdrum-tools/humdrum-tools

  Humdrum Toolkit and extras, including MIDI conversion utilities.

  Notation C++ Active 2025

• ni-midi2

  Stars: 58

  midi2-dev/ni-midi2

  Native Instruments' MIDI 2.0 foundation library (UMP, MIDI-CI, SysEx).

  MIDI 2.0 C++ MIT Active 2026

• Octavia

  Stars: 58

  ltgcgo/octavia

  Event-driven MIDI state tracker and file parser that models GM, GS, XG, and vendor SysEx.

  Web JavaScript LGPL-3.0 Active 2026

• CircuitPython MIDI

  Stars: 57

  adafruit/Adafruit_CircuitPython_MIDI

  MIDI over USB and serial for CircuitPython boards.

  Hardware Python MIT Active 2026

• MicroDexed

  Stars: 57

  dcoredump/MicroDexed

  Dexed (DX7) FM synth engine running on a Teensy.

  Hardware C++ Active 2021

• ATEPP

  Stars: 56

  tangjjbetsy/ATEPP

  Transcribed MIDI dataset of expressive piano performances by virtuoso pianists.

  Datasets Python CC0-1.0 Active 2024

• pymidi

  Stars: 53

  mik3y/pymidi

  Python RTP-MIDI / AppleMIDI implementation.

  Network Python MIT Active 2023

• midiminder

  Stars: 53

  mzero/midiminder

  Keeps ALSA MIDI connections in place across device replugs and reboots.

  Utilities C++ Active 2026

• bl-midi2-rs

  Stars: 53

  midi2-dev/bl-midi2-rs

  Strongly typed MIDI 2.0 (UMP) message library for Rust, no_std friendly.

  MIDI 2.0 Rust Other Active 2026

• MusicManipulations.jl

  Stars: 52

  JuliaMusic/MusicManipulations.jl

  Quantization, humanization and analysis of MIDI note data in Julia.

  SMF Julia MIT Active 2024

• esp32-idf-blemidi

  Stars: 52

  midibox/esp32-idf-blemidi

  BLE-MIDI server component for ESP32 projects built with ESP-IDF.

  Network C MIT Active 2023

• OSC2MIDI

  Stars: 51

  ssj71/OSC2MIDI

  Configurable bidirectional bridge between OSC messages and JACK MIDI.

  Network C GPL-3.0 Active 2025

• a2jmidid

  Stars: 50

  jackaudio/a2jmidid

  Bridge that exposes ALSA sequencer MIDI ports to JACK.

  Realtime C GPL-2.0 Active 2023

• BS2-Web

  Stars: 50

  francoisgeorgy/BS2-Web

  Browser-based Web MIDI editor for Novation Bass Station II patches and controls.

  Editors JavaScript GPL-3.0 Active 2025

• DEx (Deluge Extensions)

  Stars: 50

  silicakes/deluge-extensions

  Web MIDI companion for the Synthstrom Deluge that mirrors its displays and manages files over SysEx.

  Editors TypeScript MIT Active 2025

• Matriarch Editor

  Stars: 49

  mreid/matriarch-editor

  Web MIDI SysEx editor for the global settings of the Moog Matriarch.

  Editors JavaScript CC0-1.0 Active 2026

• JZZ-midi-SMF

  Stars: 48

  jazz-soft/JZZ-midi-SMF

  Standard MIDI File read/write/play add-on for JZZ.

  SMF JavaScript MIT Active 2025

• mididings

  Stars: 47

  mididings/mididings

  MIDI router and processor with a Python-based filter language.

  Utilities Python Other Active 2026

• ble-midi2usbhost

  Stars: 47

  rppicomidi/ble-midi2usbhost

  Turns a Raspberry Pi Pico W into a BLE-MIDI adapter for class-compliant USB MIDI devices.

  Network C Other Active 2025

• midi_synth

  Stars: 44

  fhunleth/midi_synth

  Play music from Elixir through a FluidSynth-backed synthesizer.

  Synthesis Elixir Apache-2.0 Active 2026

• midi-msg

  Stars: 43

  AlexCharlton/midi-msg

  Complete MIDI 1.0 message (and SMF) parsing and serialization for Rust, no_std friendly.

  SMF Rust Active 2026

• pico-usb-midi-filter

  Stars: 42

  rppicomidi/pico-usb-midi-filter

  Raspberry Pi Pico that sits between a USB-MIDI device and host and filters messages.

  Hardware C MIT Active 2024

• PhpTabs

  Stars: 42

  stdtabs/phptabs

  PHP library that reads and writes MIDI files alongside Guitar Pro tablature formats.

  SMF PHP LGPL-2.1 Active 2023

• RtMidi.Core

  Stars: 41

  micdah/RtMidi.Core

  Managed .NET wrapper around RtMidi.

  Realtime C# Other Active 2025

• humlib

  Stars: 39

  craigsapp/humlib

  Humdrum file parsing library with MIDI conversion tools.

  Notation C++ BSD-2-Clause Active 2026

• @julusian/midi

  Stars: 38

  Julusian/node-midi

  Maintained fork of node-midi with prebuilt binaries.

  Realtime JavaScript MIT Active 2026

• Notochord

  Stars: 37

  Intelligent-Instruments-Lab/notochord

  Probabilistic real-time MIDI performance model.

  ML Python MIT Active 2026

• ex-portmidi

  Stars: 35

  lucidstack/ex-portmidi

  Elixir bindings to PortMidi for realtime MIDI I/O.

  Realtime Elixir MIT Active 2021

• uapmd

  Stars: 34

  atsushieno/uapmd

  Plugin hosting library (VST3/AU/LV2/CLAP) with MIDI 2.0 UMP support.

  MIDI 2.0 C++ MIT Active 2026

• QmidiNet

  Stars: 31

  rncbc/qmidinet

  MIDI network gateway over UDP/IP multicast (ipMIDI compatible).

  Network C++ GPL-2.0 Active 2026

• tusb_ump

  Stars: 29

  midi2-dev/tusb_ump

  TinyUSB class driver for USB MIDI 2.0 (UMP) devices.

  MIDI 2.0 C MIT Active 2026

• midi-player (chrisguttandin)

  Stars: 29

  chrisguttandin/midi-player

  MIDI file player that sends to Web MIDI outputs with accurate scheduling.

  Web TypeScript MIT Active 2026

• amidiauto

  Stars: 25

  BlokasLabs/amidiauto

  Automatically connects ALSA MIDI devices on Linux (used by Blokas Pisound).

  Hardware C++ GPL-2.0 Active 2019

• Midiex

  Stars: 24

  haubie/midiex

  Cross-platform MIDI for Elixir built on midir via Rustler.

  Realtime Elixir MIT Active 2026

• midi2 (portable core)

  Stars: 18

  sauloverissimo/midi2

  Portable C infrastructure for building MIDI 2.0 devices and hosts.

  MIDI 2.0 C MIT Active 2026

• CircuitPython BLE MIDI

  Stars: 17

  adafruit/Adafruit_CircuitPython_BLE_MIDI

  BLE-MIDI service for CircuitPython.

  Network Python MIT Active 2026

• drumstick

  Stars: 16

  pedrolcl/drumstick

  C++/Qt MIDI libraries: ALSA sequencer, file I/O, and realtime backends.

  Utilities C++ GPL-3.0 Active 2026

• go-coremidi

  Stars: 15

  youpy/go-coremidi

  CoreMIDI bindings for Go.

  Realtime Go MIT Active 2026

• tenpin_scope

  Stars: 12

  bgporter/tenpin_scope

  Debugging monitor for MIDI 2.0 data.

  MIDI 2.0 C++ MIT Active 2026

• USB MIDI 2.0 Descriptor Builder

  Stars: 10

  midi2-dev/usbMIDI2DescriptorBuilder

  Generates USB MIDI 2.0 descriptors for device firmware.

  MIDI 2.0 JavaScript Active 2025

• Adafruit CircuitPython USB Host MIDI

  Stars: 9

  adafruit/Adafruit_CircuitPython_USB_Host_MIDI

  USB host MIDI for CircuitPython boards.

  Hardware Python MIT Active 2026

• elixir-midifile

  Stars: 8

  jimm/elixir-midifile

  MIDI file reader and writer for Elixir.

  SMF Elixir Active 2020

• sonivox

  Stars: 6

  EmbeddedSynth/sonivox

  Sonivox EAS wavetable GM synthesizer (from Android), as a standalone library.

  Synthesis C Apache-2.0 Active 2026

• midi2usbdev

  Stars: 5

  rppicomidi/midi2usbdev

  Raspberry Pi Pico as a USB-MIDI device bridging serial MIDI ports.

  Hardware C MIT Active 2026

• Magenta

  Stars: 20k

  magenta/magenta

  Google research project on ML for music and art (archived models and tools).

  ML Python Apache-2.0 Archived

• Muzic

  Stars: 5.0k

  microsoft/muzic

  Microsoft research on AI music: understanding and generation.

  ML Python MIT Archived

• MIDI.js

  Stars: 3.9k

  mudcube/MIDI.js

  Early, widely-used library for playing MIDI with SoundFonts in the browser.

  Web JavaScript MIT Archived

• Strudel

  Stars: 3.0k

  tidalcycles/strudel

  Tidal patterns in the browser, with Web MIDI output. Development continues on Codeberg.

  DAW / Live JavaScript AGPL-3.0 Archived

• Tidal

  Stars: 2.8k

  tidalcycles/Tidal

  Live-coding pattern language that can drive MIDI devices. Development continues on Codeberg.

  DAW / Live Haskell GPL-3.0 Archived

• Helm

  Stars: 2.5k

  mtytel/helm

  Polyphonic software synthesizer with many modulation sources.

  Synthesis C++ GPL-3.0 Archived

• Piano transcription

  Stars: 2.0k

  bytedance/piano_transcription

  High-resolution piano transcription with pedals (audio to MIDI).

  ML Python Archived

• GiantMIDI-Piano

  Stars: 1.9k

  bytedance/GiantMIDI-Piano

  Large classical piano MIDI dataset transcribed from recordings.

  Datasets Python Archived

• Nuked-SC55

  Stars: 757

  nukeykt/Nuked-SC55

  Low-level emulation of the Roland SC-55 sound module.

  Synthesis C++ GPL-2.0 Archived

• sfizz

  Stars: 531

  sfztools/sfizz

  SFZ sample-player library, LV2 and VST plugin.

  Synthesis C++ BSD-2-Clause Archived

• soundfont-player

  Stars: 476

  danigb/soundfont-player

  Lightweight sample-based instrument player for the browser.

  Web JavaScript MIT Archived

• OmniMIDI

  Stars: 401

  KaleidonKep99/OmniMIDI

  Low-latency SoundFont-based MIDI synthesizer driver for Windows.

  Synthesis C++ Other Archived

• Cadence

  Stars: 375

  falkTX/Cadence

  Linux audio tools including the Catia JACK/ALSA MIDI patchbay.

  Utilities Python GPL-2.0 Archived

• note-seq

  Stars: 237

  magenta/note-seq

  NoteSequence protobuf utilities: MIDI and MusicXML conversion for ML.

  ML Python Apache-2.0 Archived

• Hairless MIDI<->Serial Bridge

  Stars: 237

  projectgus/hairless-midiserial

  GUI bridge between serial ports and MIDI ports, widely used with Arduino projects.

  Utilities C++ Other Archived

• Open Stage Control

  Stars: 7

  jean-emmanuel/open-stage-control

  Customizable control surfaces for MIDI and OSC, in the browser.

  DAW / Live JavaScript Archived

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