Here's a video showing some of the sounds capable with the little Arduino synth. Without doubt the star of the show is the Zoom CDR-70 which massively enhances the depth of the sounds. The more cynical among you might think playing it through a FX pedal is cheating, but I only ever play through effects, so there. Controlling the synth is an Arturia Keystep, which has some nice arpeggiator abilities... and because I can't really play, you'll hear those a lot :-0