have searched forum for this issue but cant see it: i simply cant hear the opponent engines at all. i used to get stuttering sound from the car ahead, but now i get absolutely no sound from the opponent. settings are all ok, even when i reduce player vol to zero i get nothing from the other cars. i get nothing in car, trackside or in replay. its fine on AC, PC2 etc, but i have always had this problem on rf2. i've never messed about with the settings so i havent broken a line in the .plr for example. its baffling, any suggestions?