There's a good insight about the game surround audio possibilities in here
sfx_iAPI can be forced to 1 for DirectSound, 2 for OpenAL and 3 for XAudio2 (which is default)
A weirdly bad bug in the latter is also mentioned
Not editable
Content is available under Creative Commons Attribution Non-Commercial Share Alike unless otherwise noted.
The game has "Color Settings" in its video settings, does this refer to a color-blind mode? A Google search doesn't bring up anything and I'm not able to access the game to test at the moment.