This app is now the bomb (a good thing) with audio copy/paste. Using iShred and FourTrack I was able to refine the composition of my lasted tune. The "pre-demo demo created with this app and FourTrack actually sounded pretty good!
Only thing left to add is the bass guitar equivalent to iShred and you can work out all parts of an entire tune.
This is the most realistic instrument simulator for the iPhone. Amazing, Amazing work. Dont hesitate to buy this.
BuzzToronto about iShred