There's a slight but noticable delay between hitting a pad and hearing the note on the pi, that isn't present on OS X. That makes me think it's not something in the code, but rather something to do with the audio setup on the pi. Some things to try:
does this happen if I use the internal soundcard instead of the USB one?
does this happen if I use the USB soundcard on OS X?
There's a slight but noticable delay between hitting a pad and hearing the note on the pi, that isn't present on OS X. That makes me think it's not something in the code, but rather something to do with the audio setup on the pi. Some things to try: