This can be changed easily, but consider that it might not be fair for previous ratings to be applied to a new song. Hopefully, the new revision should be better than the old revision, and the old ratings were rating a song that uses different instruments or a different melody.
Another way of dealing with this problem would be to display two ratings: one for the current version, and one for the entire history of the song overall. The same could be done with downloads and views. Does that sound like a good idea, or should a different approach be used?
Now you can embed your songs in forum posts and webpages just like this image! Click the image to find out how!