Simple AS3364 Quad VCA board.
Dual ADSR with separate controls for each envelope generator.
Dual ADSR with controls shared between each envelope generator.
Stripboard layout for core building blocks of a basic polyphonic build based on Polykit’s Pi Pico DCO. Could probably be squeezed into a 4-voice module without too much issue, lots of options for modding. Hopefully useful for someone out there.