Hey guys,

I am currently having trouble with my headset / sound card combo and was wondering if anyone had any suggestions. Here are my specs:

Running off an N53SV Series ASUS
i7 processor
nvidia GEForce GT 540M
Windows 7

But I'm not sure any of that is of great importance. The devices I'm using for my sound are:

Razer Tiamat 7.1 headset
XS71U Diamond HD 7.1 external sound card

One (or both) of these aren't working quite right. I've set the sound card as my default one, and configured it to run 7.1 surround sound. While I can hear sound, the only thing governing the level of the sound are the front volume mixer and the main volume mixer on the razer sound panel. The sub, rear, center, and side mixers don't seem to do anything, and I'm only getting sound from the front speakers as if it wasn't 7.1.

Additionally, every time sound is being played on the speakers, a high pitched noise plays on the speakers, softly but noticeably. Does anyone have any experience with either of these devices or sound manipulation in general that would have any suggestions?

Thanks!