I'm trying to clean up an mp3 folder which has a plethora of duplicate files in it due to accidentally dragging my music folder into iTunes and having it re-import songs which were already in the play list.

I tried writing a quick Python app to md5 all of the files, and delete exact duplicates. This took out ~2gb of files. Unfortunately, however, this does not work on all of the duplicates because of an iTunes feature. iTunes has changed the ID3 title on some of the duplicate songs, which means the md5 of the entire file is different from the same song with a different ID3 tag.

Are there any free applications out there (for the mac) which can compare the data of the actual song (ignoring ID3 tags) and determine if duplicates exist?