#CircuitPython controlled pocket operator. KB2040 is setup as a midi in device. Reason is sending out four midi tracks on four different midi channels. Each button/synth voice on the pocket operator is assigned a midi channel. When a note on message comes in on the corresponding channel, the button is triggered via GPIO through a mosfet. The DAC is controlling the pot that is used for notes for some of the synth voices #pocketoperator