I like the idea of recording, but I don't really like the idea of ranking users. For one, who does the ranking? The users themselves are biased towards their ow

I like the idea of recording, but I don't really like the idea of ranking users. For one, who does the ranking? The users themselves are biased towards their own works and wouldn't produce a fair result, and ranking the performances algorithmically sounds like a recipe for disaster. I think a better solution is to instead try to form social networks. You could be matched with other users that like the same sort of music and have the same sort of skill level as you and you can swap performances and compositions.