@captain, thanks for that info. I've spent the last hour trying to figure out how to convert my DTS 5.1 Audio CD's to flac 5.1, to no avail. I cannot figure out or find a converter that can do it, Mac or PC. Then I just read your post to find, even if I had found a way, it wont work!
Isn't the Premium audio supposed to support 5.1 in some way? If so, how? I'd love to hear that quality in my MS!!
TIA