I've also run into this a couple of times. Last time was a couple of weeks ago. I did a clean reinstall of my nvidia drivers but opted not to install the nvidia audio driver since I don't need it.
What happened was that the center channel for my audio output was ignored like what a couple of posters above have said, resulting in my not hearing any station communications. If I opened my computer's audio properties and switched it to stereo, then back to surround, everything would sound correct in Elite. I could do this before loading Elite or while in game. BUT, I'd have to do this every time I played.
I ended up just reinstalling the nvidia audio driver and the issue hasn't come up again.
What happened was that the center channel for my audio output was ignored like what a couple of posters above have said, resulting in my not hearing any station communications. If I opened my computer's audio properties and switched it to stereo, then back to surround, everything would sound correct in Elite. I could do this before loading Elite or while in game. BUT, I'd have to do this every time I played.
I ended up just reinstalling the nvidia audio driver and the issue hasn't come up again.