I messed with various settings. None of them fixed the problem. That includes testing both 16 bit and 24 bit 44,100 Khz settings. The only thing that made starcraft 2 not affect the audio quality is enabling the Disable all sound effects option.
![[image loading]](http://i.imgur.com/CTPaL.png)
I don't know why opening starcraft 2 enables a sound effect that causes audio degradation. Anyone have any clue?