Hi Matt,
Thanks for the reply. I just tried every option I could think of on the "Channels" setup:
5.1 - no extra channels, 2 extra channels
7.1 - no extra channels
both above adding JRSS mixing on and off.
I still am missing the 2 channels that need to be added to my surround back channels. There is mention on that page of matching (or not) the input channel set up to output set up but I don't know where the input channel set up would be. Also, the Channels set up says "Source" channels so I'm not certain if putting 5.1 there is for output or input. That's why I tried both 5.1 and 7.1. Thanks.