ufoai-2.4-dev-1301086950-Debug-pentium3-O1-sse-7z-full-win32
Lets say you set your volume controls next to mute, with speakers set high. Then enter into a mission where the mission has a background sound track. The sounds of the mission will be blaring out the speakers, when the music and interface is still nearly muted. This is not any more mission specific than needing a background track, it has happened to me on many missions.
Perhaps audio rendering of maps should follow with the music control, or a 'backgound' audio control could be added?