Ooooo, I think I know this one!

Philip, remember, that before you switch to the 6 ch input, you *do* have to be in a 5.1 digital mode or you *only* will get the front 2 channels (if you're switching from stereo for example).

Or else it will be the particular section of the disc you're listening too like what SLL said.

(I know that in my player's config, I have it set to default to the 2 channel SACD feed. I still don't have a lot of faith yet in multi-channel music mixes. But this is certainly a disc to check it out on...)