The “Granular Synth” idea harks back to an old Auduino project. I stumbled upon it again recently and decided it deserved a quick build in an Altoids tin ..
.. because granular synthesis is a basically how they make Altoids, right?
As always, all notes, schematics and code are in the Little Electronics & Arduino Projects repo on GitHub
If you can put up with 5 minutes of me fiddling around, here’s a taste of how it performs..