Seems I can get 5.1 through digital optical output but can I get 5.1 through HDMI if 7.1 doesn't work?
I run all of my systems through the Onkyo with HDMI and then I have one HDMI to my TV from the Onkyo unit.
Onkyo surround sound HTR680
Dish VIP722k receiver (just installed 11/23/13)