I don't know. Is there a sound output gain control in settings? If it is set to maximum, turn it down. But PS2 is not a DVD player specific device. Same with XBox. It is not optimized for DVD movies and surround sound from movie tracks. Rather than waste time and effort, figuring out an answer to a question that is not that important, I'd suggest that you just play your movies on a real player in your home entertainment system ...