I use an optical cable from my PC to my DAC. If I got a sound card that supported cool things like Dolby Headphone, would those features work on the SPDIF/Toslink output, or are those features only used for the analog output? Or is there a difference at all? In short, I'd like a setup like this: Foobar (wasapi) -> soundcard (applies Dolby Headphone DSP to digital stream) -> optical cable -> DAC -> amp/ headphones but I'm afraid that the only way to get dolby headphone with a sound card is: Foobar (wasapi) -> sound card (applies dolby headphone DSP to analog out) -> amp/headphones Has anyone had experience with this? Dolby seems like it could be at least mildly entertaining to experience sometime with a good set of headphones.