Open source music hardware projects

This list of open source music hardware projects includes brands or projects relative to electro-music where schematics and firmaware are open-source. However it also includes projects which are not fully open source hardware as defined by the Open Source Hardware Association.

Amplifiers

 * AX84, a variety of music electronics projects.

Mixers

 * Aurora, music mixer for DJ's

Controllers

 * Monome
 * O0SCC – controller that communicates via the open sound control protocol.
 * Open Pipe
 * OpenPipe
 * Vectr 3D Sensing Controller

Enclosures

 * Eurorack Lasercut Case

MIDI

 * MIDIbox – The MIDIbox project is an open-source modular DIY hardware and software platform for MIDI devices like controllers, synthesizers, sequencers
 * MIDIsense

Synthesizers and modules

 * Adafruit Industries, has more than just the x0xb0x
 * Arduino-eurorack-projects
 * Barton Musical Circuits
 * Bastl Instruments
 * Befaco
 * Circuit Abbey G8 clock divider
 * Collidoscope
 * Creative Technologies (CTAG), a group of Kiel University of Applied Sciences and external collaborators whose focus includes sound synthesis electronics
 * deanm1278 on GitHub, various mostly Arduino
 * DSO138 Oscilloscope Eurorack Mount
 * eChanter
 * Erica Synths DIY Eurorack Modules
 * Futur3soundz XFM2
 * Giters: eurorack-diy, synth diy, etc.
 * GMSN! (archived). See JoeEarlam/GMSNPure, an attempt to collate all GMSN's OS designs since it went offline.
 * HackMe
 * Hansy1010
 * JoyfulNoise Tiny Utility Board
 * Lush Projects LushOne
 * Mad Science Lab SSM1
 * MeeBlip
 * MiDispositivoMIDI
 * Modular Synthesizer
 * Music Thing Modular
 * Mutable Instruments
 * Nickajeglin Eurorack-pcbs
 * One Bit Groove Box
 * Open-Modular.com, Open Source music design hardware and software
 * Open NSynth Super
 * OTTO - multi-track synth/sampler/sequencer/groovebox
 * PreenFM
 * RealSIDShield, an Arduino shield to use a MOS Technology 6581/8580 SID to play .SID files.
 * TSynth, a Teensy 4.1 based synthesizer
 * xnotox on GitHub
 * Zoybar
 * Zynthian

Sequencers

 * Rebel Technology Stoicheia
 * Lötklaus Pro – an Arduino based sequencer

Theremins

 * Open Theremin

Microcontroller based

 * Arduinome
 * ArduTouch, an Arduino-compatible music synthesizer kit.
 * Bela audio platform and sensor processing
 * Goom, an open source multi-timbral polyphonic synthesizer.

Resources

 * Adafruit Industries
 * Zoybar social network

Tools & test equipment

 * DSO Nano, a a pocket size digital storage oscilloscope.