I have a problem with the sound becoming distorted and crackly / fuzzy. It seems to affect all the various channels (music, ambient, voice, etc.).
I'm not sure when exactly this first started (within the last month or so) but it only affects ESO. It appears to be random and sometimes I can go for hours without it happening - I have not been able to isolate anything that triggers it. If I quit out of the game and restart the problem goes, but can reappear at any time, which is rather inconvenient.