I'm also having a sound issue in the game. I bought it on Steam so I believe it's up to date. If I'm facing one of the characters talking to me in the game I can't hear them. If i move my head to the left I can hear them. It's like I can only hear out of my right ear. Also, I can hear gunfire but I can't hear my gun reloading. It's very strange. Crysis sound worked perfect, along with left 4 dead. It has to be something with the surround sound but I'm not quite sure what. Thanks.