Web Audio DAW. Use the Web Audio API for dynamic sound synthesis. It's like jQuery for your ears.

Your Hardcore Loop Machine.

🎹🎶 A baremetal kernel that turns your Raspberry Pi 3 or later into a Roland MT-32 emulator and SoundFont synthesizer based on Circle, Munt, and FluidSynth.

Piano LED Visualizer: Connect an LED strip to your Raspberry Pi and create an immersive visual experience for your piano playing

Swiss knife for everything MIDI related

ESP32S2 native USB library. Implemented few common classes, like MIDI, CDC, HID or DFU (update).

Realtime MIDI IO for Ruby

Allows a microcontroller, with native USB capabilities, to appear as a MIDI device over USB to a connected computer

Ableton MIDI Sculptor: Tools for MIDI editing in Ableton Live

Control the Sega Mega Drive's Yamaha YM2612 and PSG with MIDI

🎼 C++11 MIDI file & realtime io library

BMC the Badass MIDI Controller, all-in-one Scalable MIDI Controller library with a companion Desktop/Browser Editor App for Teensy 3.2, 3.5, 3.6, 4.0, 4.1, Micromod

osmid is a tool to bridge MIDI and OSC. It is currently in use in Sonic Pi

An open-source MIDI-to-CV Eurorack module that runs CircuitPython

A HW build of the MT32-PI project, allowing you to emulate a Roland MT-32 using a Raspberry Pi. Includes enough additional modules to build a MIDI-mountain as well as adapters for connecting to most things retro.

Open source Arduino MIDI controller.

a tool to make NI Komplete Kontrol MK2 controllers more usable on Linux - and an alternative solution for macOS

Novation Bass Station II Web interface

MIDI to USB converter cable using STM32F103 microcontroller

Polyphonic wavetable synthesizer for the Raspberry Pi Pico