I'm looking for a fun music app to play with/record with. Jasuto fits the bill. However, looking at the description, the author warns that it's untested with 1G iPod Touches, and may not work well. Because I have a 1G, this worries me. Especially at $4.99 for the app. Is anyone here using it on a 1G Touch? How well does it work? Is the sound quality good enough for recording, or potentially live performance?