[BUG] As you can see:
The Sound Mixer is kinda unusable. Game is running. Newest game version. Win8 x64. Realtek Sound card
The sound bar is actually there, but the icon is way to huge to see it. Turns white:
So yeah, Devs, please resize that huge icon 
Same here and:
The sound stutters on my computer
Specs: Windows 8 x64; Intel Core i5-3570k, Nvidia GTX 670
Sound output via HDMI from the GTX670 to my Samsung display.
I turned off the music, but it enables itself again after a few minutes oO
Already reported here:
http://forum.greenheartgames.com/t/win-icon-in-win7-volume-mixer-is-crazy-oversized/476