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

If you are going to get into this world, you should spend 30 minutes and educate yourself on your setup.

Optical connection will not work. HDMI cables are super simple. all you do is use an HDMI cable to connect from the monitor output on the denon to the eARC HDMI input on the TV.

It might be that simple.

EDIT: Make sure you understand that 7.1 is not atmos. 7.1 means you have 7 base layer speakers and 1 subwoofer. Base layer speakers are front center/left/right (3 speakers) and surround left/right (2 speakers) and rear left/right (2) speakers to get to 7 speakers. Atmos speakers are indicated by a third number lik 7.1.2 (7 base speakers, 1 subwoofer and 2 atmos speakers). Atmos speakers are spatial speakers that will provide sound from above. Your denon will not be able to output atmos if you dont have any atmos speakers.