When playing any mission, both campaign and skirmish, two music tracks will play at the same time. One track will be correct with the music changing to the current situation (combat = action music and non-combat = calm or tension music) and being affected by the music volume settings. The second music track will be blasting the US or JP (depending on choice of team) tension music regardless of situation and music volume control. I am using a DVD-ROM copy of the game. Any help would be appreciated.