I actually have a band and this app could be for me this summer. But I didn't get it at all the first time. The only reason I looked at it twice was that I found it here on HN. Not all your potential customers are the typical music-branch-guy. Also, something to easier distinguish different widgets would really help! User defined color or something.

I really like the one-man-army way. Keep it up, you got some good stuff going on!