MIDI triggered PCM Sample Player
I found an old thumb drive and it had this Arduino project from 2010 on it. I was trying to make a drum machine with PCM samples using the high-low tech Arduino PCM playback library and encoder.
I cleaned up the code and built it into a case with a Pro Trinket. It plays samples with a very noisy gritty lo-fi sound. Some extra pots allow you to further mangle the sounds. In addition to being noisy, audio output is very low.
I was thinking about making some better samples but I couldn’t get the encoder to work without risking messing up my Java environment, so I didn’t try :-P