I recently rented the game "Genji: Dawn of the Samurai" for the PS2 from GameFly. I therefore do not have access to the game's manual. The game featured more audio options than I am accustomed to. Besides the normal sliders for BMG and Effects levels, there was a choice of four sound formats. Mono and Stereo were present and expected. What puzzled me was that I could choose between Dolby Pro Logic II and Dolby Digital Pro Logic II. Since neither of these options is true Dolby 5.1, I was curious what the difference was. Anyone think they know? BTW, the game also allowed you to choose an audio reference point. Player, Camera and Realistic were all options. I was very impressed by the audio presentation of this game. It has a beautiful soundtrack. I wish I could say the same about the actual game-play.