I seem to have this problem when i installed my ASUS Xonar DS PCI Soundcard. the problem is when i have music on in the background and play a game like CSS, and i say shoot or i hear shots, the music quietens and then when the shooting stops, it goes back to normal. System (incase you need it) i5 760 @ 4.2 GTX460 740/1480/1800 8GBDDR3 Xonar DS Steelseries Siberia V1 Win7 x64 There is probarly a simple solution to this problem and i might have missed it, but im sure you lovely people would gladly help me out .