From the looks of that software, you can clearly see the Headphone virtualizer on the bottom right. The only issue there is that you can't see where it goes from a Dolby headphone 2 equivalent to Dolby headphone 3 (a reverb-y mess). Or are the sliders for volume, and not surround effect?
this is how it looks on the Creative...
And on the Xonar (no slider, just a choice between the 3 DH modes.
Also, not sure if you knew this or not, but make sure your sound device is set to 5.1 or 7.1, because if not, you won't get proper DH, THX Tru Studio, etc.
Despite what the image shows, the Xonar U3 digital out isn't tweakable (but the top one is, which directly affects the digital out anyways)
Edited by Mad Lust Envy - 7/4/13 at 9:05am