This is a short demonstration of my MIDI and Audio board for a Raspberry Pi 400 with additional components supporting the user interface controls for MiniDexed.

As shown in the video, the RPi-400's keyboard can be used directly as a music controller which makes testing everything relatively straight forward.

Full details here: https://diyelectromusic.wordpress.com/2023/12/18/rpi-400-midi-and-audio-pcb-build-guide/

Kevin