Game region version [EU or what]: US
Game update number [downloaded fixes]: 1.40
Firmware version: 2.76
Console version and harddrive size: November 2008, NTSC, 80 GB
Custom soundtrack, yes or no: No
Controller type: Dualshock 3 / Sixaxis
Options settings: Default
Track [if any] where error occurs: Any
Online/Offline: offline

Music and sound effects will be functioning fine, then all sound will cease at random. This does not occur every gaming session, but does seem to happen when loading a track, or when transitioning from the load screen to the actual race. Also happens at other random times.

The only way to get the sound functioning again is to exit the game and re-enter.