re: Who to Call .... Dolby Atmos Samsung-Denon

This is super simple. Get rid of optical. If using apps on TV to stream then use HDMI via arc to receiver. If using another source that will go Into receiver via HDMI plug that I to receiver input and use out HDMI to tv. On denon remote at bottom it should have a list of audio choices. I think it might be a button named PURE. Press that until it says auto. Make sure your content has atmos encoding and it's turned on for that device. And like said above you need 7.1.2 . The .2 would be 1 set of height speakers.