I really don't see the point in using the whole keyboard for the same finger snap sound. I would map it to the top couple of notes allowing a normal voice for the rest of right hand play and easy triggering during live play. Or do as I do and map it just above the top note of the specific tune you are playing so you can trigger anytime with the little finger of the right hand while playing another instrument at the same time. The alternative would be to just put it in a pad.