this is kind of a problem with minidisc. if you direct download to md using software, you can do the same in reverse ( md to pc). in that case, it would work just like an ipod, "downloading" instead of "recording". you are recording, therefore the pc cannot directly upload and has to record like old school tapes. i used to do this with mine off of sirius sattelite on my tv. to put music from my minidisc to my computer i used a program called "messer". it is freeware and worked pretty well. the biggest problem i had was with the volume settings, but once i set them right, it was very good. record a few short clips with it and get the settings right and it will do very nice.
http://www.snapfiles.com/get/messer.html
what a shame that minidisc didn't catch on better here. i love them.