I previously posted a similar message in the "How to rip" thread, but it wasn't entirely answered. Once an ISO is obtained and burned to a DVD, can music be extracted from the game so it can be played on the computer from a media file? Those of us with ISOs: it would be nice if you can confirm if this can be done.
get gctool and open the gcm you want the music from. If the game has .dsp files, those music files can be played using a winamp plugin. If not, there is no way.