I had a problem with my game where there was no audio, but there was a thread I found a while ago that fixed it by setting your headphones frequency to 44100 hz, which restored the sound, but there's still one more problem. Whenever I change pages in a note, the sound would mute, and I would have to restart the game to get it working again. This isn't really a deal breaker, but it basically means if I want to read a note in a mission (usually with useful information about loot spots in the level