Audio problems with Ninja Gaiden

I just bought Ninja Gaiden today and started playing it. The audio in every cut scene doesn't work. The dialogue sounds like the characters are mumbling and without subtitles you can't understand what they're saying. I went to the audio menu and turned up the dialogue volume to 100 and that didn't work. So I figured it was my stereo checked all the connections it was all working good. So I thought it might be the system and tried all my other games and there weren't any problems. I returned the game to EB and got another copy and it has the same problem. Has anyone else had this problem?