I'm a looking for an app that I can use in a live performance situation similar to GarageBand but something with a UI that is more designed for live performance, big buttons to control things like tempo, effects and accompaniments on the fly. I'd like to have the ability to bring in my own recordings as accompaniments and change them on the fly. For example a bass and rhythm guitar playing over some loops, then at anytime I can change one or all three on these pieces to something else I recorded and or there tempo. I'd also like to be able to control the effects on my guitar live through this app. I have the peavy ampkit that i'll use to plug my guitar into my iPad.