Is this all correct? Or is it the other around for the stereo mix settings and playback settings, from what I read on another forum (still wouldn't make sense though, as Dolby Headphone doesn't work as soon as I set the default playback device to Speaker). I'm just trying to make sure I'm listening 100% to the dac and just using the Xonar as a DSP only.
the dac you are using is usb? The spdif passthrough device is a direct path to the optical transmitter, so no processing is being done. If you want the dsp, you have to listen to Speakers - Asus Xonar DG.