Hi guys, I'm using the Stereo Tool's latest beta, and just installed Realtek HDA X-Fi modded drivers. I have a Realtek ALC892 over here, and the audio quality increased a lot. I disabled all audio effects (SRS and Dolby processing are enabled by default), and Stereo Tool now shines much more. I think everyone that got a Realtek HDA chip should give these drivers a try.
http://claudiogamespirit.blogspot.com.b ... dx-fi.html
P.S.: I used the 2.70 Final one. I don't know if other versions will work too.