Working on a zero-budget pitch for a potential viral video project, and for it, I need to apply some auto-tune pitch-bending effects to spoken word AIFF files, CHEAP. Because this is a notional spec job just to test out and demonstrate the concept, before movong ahead to a higher level budgeted version, I want to use a "disposable" tool that is free or very cheap, that will work on a mac. Anybody have a recommendation? Thanks for any help. I've heard of the auto-tune app for the iphone, but I donlt have access to any iphones. But something like that app is what I'm after.