4 layers119 × 63.2 mm

OpenChordM1
FugLong/OpenChord
An open-source music device for portable, expressive, and extensible audio creation.
75 parts3MIT
KiCad boards from 1 GitHub repository tagged “chord”, the most starred first; open any of them in PCBKit.

FugLong/OpenChord
An open-source music device for portable, expressive, and extensible audio creation.