I am looking for software that has the playback capability of GarageBand - with the addition of accepting a colck signal via the IAC bus. I want something that will accept .AIFF files spat out of SDK Look Utility for playback, and then have the tempo slaved to the IAC bus (Circular Logic has a cool app that will enable tempo matching to a live drummer) Any recomendations? Trying to find something cheap (free...?) I know Live will do what I'm asking - but I don't have the $$$ or the need (yet) for all the additional processing power. HELP!?!?!?!?!

thanks