Had some leftover time on a trip recently and decided to revisit this thing. Haven't tested anything yet, but I think both the code and graphics look promising. Hopefully I'll be able to test it some time this Autumn. Below is the current graphic displayed with a gerber viewer (won't be so colorful). The red sections would be exposed FR4 backlit by LEDs.
The system clock parameter doubles as a program selector when in momentary bypass. Additional footswitch to maximize the looping. Ditching the grain direction switch and instead offering both forward and backward granular delay/stretching. Random vibrato (MOD) to make it more lively. The core schematic for this thing is laughably simple so it was fun to see how much functionality I could squeeze into it without adding too much extra circuitry.
Feedback is welcome