My first demo app is nearly done, but I need to fill out the audio aspect. I'm working in MacOS X, and it came with Garage Band (KickAss!! I think). I have a few mp3, WAV, AIFF files I've imported but I want to change their frequencies (speed them up/slow them down) to produce different notes, ( doh ray me fah so la tee dah), but I don't know how to do it. I've spent most of today reading through the tutorials, manual/help files but I'm trouble finding out anything about transforming selections within a track. Anybody ever use GarageBand?