https://github.com/icebreaker-fpga/icebreaker
iCE40UP5K
interesting ice40 projects:
part 1: https://youtu.be/4-JE2nZt0sk part 2: https://youtu.be/UD2h8IuLXCQ
https://github.com/smunaut/ice40-playground/tree/wip-audio
