You have a Xonar Essence ST already, and want to throw a Bifrost into the mix? That's a bit of a surprise.
Unfortunately, there's a quirk I've heard about with Xonar cards; they allegedly won't let you output a stereo PCM signal through S/PDIF that's been pre-processed with Dolby Headphone. I don't know if this extends to other C-Media-based cards like the HT Omega lineup and the Auzentech X-Meridian, since they use somewhat different driver packages. Note that I cannot confirm or deny this myself without one of those cards.
Now that I'm looking I see that it can do Pro Logic 2 and a "7.1 speaker shifter" via spdif, but that would get reduced back to 2.0 in the Bifrost anyway. Stereo is fine for my single player gaming. I've been playing in stereo on the PC ever since I got the Lyr.
Why is it a surprise that I would want a separate DAC? I figured the Bifrost would sound better than a Xonar ST, but then again I've never had anything like it before.
Edited by Rebel975 - 1/1/12 at 10:08pm