Certainly this app is not the best, but it is one of the few that I've found that actually work. (((Note: there is a lot of high-frequency noise at the beginning and end of the songs, and I'm sure it goes through out the song as well, but it should be good enough to still pull off your performance.))) Is it worthy of $.99? I suppose so, but they should add some extra features, like export to MP3 or give the option to email the file. 4 stars is a bit much, but I see the potential for this app to be a cut above the rest.