Smile! backing track test (volunteers requested)

[Scherzando]

Hey all, I'm messing around with Smile! and have prepared this draft piano backing track. Could anyone give it a listen and let me know if they hear anything off? In particular, I'm looking for technical sound issues/glitches as opposed to mistakes and such. (If you can hear vocals from the original Smile!, ignore those, they'll be edited out later.)

Headsup: It's .wav, so it's obnoxiously big for a short piece (almost 40MB).

http://www.mediafire.com/?o4xcp4o6hwxy94p

Thanks!