Build Your Own Pico Powered Midi Controller for $35 — Ian Wootten
GitHub - lambdaton/lambdacontrol-midibox-firmware: MIOS32 firmware (MIDIbox project) for my DIY MIDI controller LambdaControl.
Building a sweet plastic MIDI controller | Arduino Blog
Teensy DIY MIDI Controller demo - YouTube
DIY MIDI Controller with CircuitPython, Raspberry Pi Pico, LED Arcade Buttons, and 3D Printed Case #MusicMonday « Adafruit Industries – Makers, hackers, artists, designers and engineers!