QICSAMD51Pots

This board starts with a SAMD51 – the same family as the Adafruit Feather M4.  I loaded it with the Adafruit bootloader.

I then added:

Isolated USB

Larger external QSPI flash for sample storage (still untested)

External QSPI SRAM for longer delays (still untested)

MIDI in

Two potentiometers

All in a form-factor that minimizes breadboard usage, so you can squeeze some serious processing into the smaller QICboards.

PDF of schematic:

Altium source files:

Gerbers: