Hmm.. What's the file extension of the music?
I think that GraphEdit from
Doom9 can take apart any type of video or music file, and u can turn it into different formats also. But the file compression is really flimsy, and you're better off finding a different type of converter.
It's located under Audio Tools, and it's the fourth program down. I recommend trying this out if u think the converter ur using might be the problem...