yea, i kinda have been having the same problem, the first time i went through the game everything worked fine, but now when im going through the game a 2nd time (im doing a playthrough, as linked in my signature) sometimes the music does not play in some bits, only a few times and mostly in broken valley, i though it was a problem with FRAPS, my video recording software but if other people have it... then i don't know, nether the less i have played through the game before and heard all the EPIC music so it does not bother me, im just concerned it might bother my viewers.