I am wondering if the HM-601 is supposed to be able to play 24/192 files ? I've got such an album from HDTracks and it freezes everytime I try to play one of the track.
No, it shouln't be able to do that. Hardware limitations. 96/24 is possible. If you really want to listen to that album, you'll have to down-convert it to 96/24. As far as I know... At least this is the case with my HM-602.