But i can use Dolby Headphone codec on Media Player Classic, can't? So i just plug or the headphone directly on laptop or plug the DSS to amp the laptop output.
And this Turtle Beach's "Advance Micro II"? Will add an optical output by $20. So i can pass directly the Dolby Digital audio to DSS to decode it and encode using Dolby Headphone...
This USB cards will be at least $60 w/ shipping :/
Oh, for movies? Yes, you can easily do Dolby Headphone through media players. I thought you were talking about gaming, in which case it needs to be part of the audio device driver.
Cheap USB S/PDIF output devices may provide a passthrough, but remember that for sources that aren't already encoded in Dolby Digital or DTS, all you get is stereo unless they explicitly support Dolby Digital Live and/or DTS Connect.