In the AudioDSP project, I built an Arduino pedal/DSP unit based on the Electrosmash pedalSHIELD design. It worked well enough that I wanted to build the “real thing”, not only to give myself a good baseline on expected performance, but also to payback Electrosmash in a small way. Good OSH deserves support! As always, all notes, schematics and code are in the Little Electronics & Arduino Projects repo on GitHub