OK, I've got a Bluegrass DVD-A from Bela Fleck and can't find the AR Stereo mix. It defaults to multi-mix and the top menu does not display an option of mixes. Additionaly, when I select group 2 on my RP-91, it recycles and goes back to group 1 (multimix). The rear cover of the jewel box states "This disc plays 3 ways: Advanced Resolution Stereo - Adv Res 6 Channel Surround Sound - DVD Video Compatible Dolby Digital". I believe all my other DVD-A's (except Doobies Captain & Me, which is a flipper) offer a mix choice from the top menu. What am I missing here? I wanted to give a listen, he's coming to town next week with Edgar Meyer ("greatest living bass player"), so I need to or a ticket.