Thanks to BrianC at DigitalAudioGuide forum for persevering with his Panny RA60. For the RP82 you similarly need to have your sub turned ON in the MultiChannel setup, then you can select the hi-res MC mix. Of course this is dumb, and is irrelevant as to whether you should be able to select the MC mix...a definite Panny software glitch, but a work-around. Worth people with other models checking, JIC they have their players set up for no sub, and a similar glitch exists. Explains why discs I *thought* had worked in MC now didn't: I had turned the sub OFF on my new RP82, but it had been ON on my previous one. For people like me, who require the sub setting to be OFF in my system (I don't use a LFE channel so I can dispense with BM, which I don't like), it means I won't get much bass for DVD-A's from the sub, but at least I can hear the MC mixes. Why some people set up no sub in the 82 menu when they DO have a sub: in the 82 there's no real BM, but when you select no sub in the 82 setup menu all LFE is directed to the front L and R outputs, that's why the 82 forces front L/R speakers to LARGE with no sub. That's the way I like it, as my front L/R pre outs feed the subs.