Question for all you RP-91 experts: Although I currently use the RP-91 for DVD-A, I am trying to figure out how to turn off this funtionality so I can access the Dolby Digital tracks on some Warner DVD-A releases, i.e. Fleetwood Mac. Some DVD-A discs give you a menu to access the Hi-Rez tracks or pick the DD/DTS versions, but not all. I have looked through the manual and have played with the menu settings on the player for over 1 hour to no avail. Please help!