TES sounds are softer than normal

[azuremight]

This happened recently; the sound volume for Oblivion and Skyrim are significantly softer than normal. I have my windows volume at 100%, and my master volume in the game cranked up to full, and the sound is rather soft. Other games and stuff, like videos, are ok though; the only problem is with Oblivion and Skyrim.
Anyone know whats the problem? My sound for oblivion used to be normal, till about 2 weeks ago.