I recently purchased a Denon DVD-2910 and I'm having trouble getting the rear and center channels to function when playing SACD disks. All channels work fine playing DVD's through HDMI, but the 5.1 analog cables only seem to carry the front and SW signals. I have selected "Multi" for the "Pure Direct" option, so the multi-channels on an SACD should be picked up. On my Denon AVR-3806 the input automatically changes to EXT. IN (5.1 analog). I have tried swapping the fronts with the rears to determine if the 2910 or 3806 is having the problem... the front signal did pass to my rear speakers, so I know that it's not the receiver. I believe the source of the problem is that I'm unable to configure all the "Audio Setup" settings. For some reason only the "Compression" and "SACD Filter" options can be changed. (All the others are grayed out.) These are the settings that I cannot change, and the current values: DIGITAL OUTPUT NORMAL LPCM (44.1/48K) OFF SOURCE DIRECT OFF BASS ENHANCER OFF Thanks in advance for any help!