The only way to have different data bits but be able to identify duplicates is a soundprint, though. Unless there's a cool open source sound print algorithm, I don't know that I'll ever be able to have two rips that i can identify as the same tune.

I think you need both checks, actually. If the strict-data hash matches, then you are just dropping the exact same song in, and that _should_ be skipped ("Oh -- i see you already have this exact song on your Empeg, I won't put it on a second time"). If not, then you would soundprint them and if the sound print matches then you know it is a different version of the same song ("Oh -- this is the same song, but the first match failed so I know the bytes are different -- I need to replace the tune").

Anyone know of a soundprint algorithm?