From what I can see.... The only Digital Outputs for MD format are on decks intended for home stereo systems. Assuming you have a Digital In (Optical, perhaps) on the sound card, you can do Digital to Digital with a PC. However, not enough of the SoundCards out in the hands of most people have the Digital In.

Note prices for a deck and associated soundcard gets somewhat pricey. At least here in Canada it is.

It would be nice to have both items, but I don't see it in my immediate future.