I've got a vanilla blue-ray player connected to my 975. The BR is set to 5.1 sound. I THINK the 975 is as well, but it won't play out the rears.

Now, with an Xbox One it works fine (using the speaker test, where the grunt points at the current speaker as he talks through it), so I know it's connected correctly.

The manual is absolutely impossible to figure out. What scrolls by on the 975's display bears little resemblance to what's printed in the manual. The abbreviations are too hard to figure out.

So, what setting(s) do I have to use to watch a movie with 5.1 sound?