Windows 7: Xonar DS Audio Center tutorial/walkthrough

So, I'm a gamer. I can tell you so many things about video card and computers and anything to do with framerates etc.



I recently purchased a Xonar DS audio card and a set of Sennheiser headphones to just up my comfort and quality of sound for my new gaming rig.

I hand installed the audio card and downloaded the latest current drivers. Everything went swimmingly and without problem. I recommend both these products (so far).

But my main question is. I am an audio noob. I look at this Xonar Audio center from my system tray and 90% of it is greek to me. Are there any tutorials out there for setting up all of the settings. I mean obviously so far I am A-ok with defaults. But some of the buttons I see are "Hi-Fi" and "Gx." What might these be?

Thanks in advance for any help/pointers/pushes in the right direction.