Well, there are also site-specific awards, Gamespot and IGN's being some of the more prominent ones.
Are you sure? these two sites are part of the TGA jury...
link: http://thegameawards.com/jury-and-advisors/
Didn't want to go off topic here but it will be short. I didn't turn off the music until I had 1,000 hours playing the game. After that it became irritating. And the sound effects are so good that without the music, I felt much more immersed into the game for the next 550 hours I've played it!@RageGT It should be both, as there is not any "Best Soundtrack" category. But I'm guessing the soundtracks of the games would overpower the effects a lot, as most people leave them turned on (I should say you are missing A LOT though, if you are not listening to the masterpiece soundtrack. Even if you like to not listen to it in-game, you should listen to it outside of the game to behold the awesomeness )