I have a Marantz receiver SR 6011. Through HDMI ARC, I have connected the receiver with my LG OLED TV that supports ATMOS.
On the remote of my Marantz receiver, I have sound mode selection that always shows me 4-5 options - Stereo, Dolby Surround, DTS Neural:X, Multi CH Stereo, and Virtual. Some of these are auto explanatory like Stereo and Multi Ch Stetreo and I use them I am listening to Music via Spotify Connect.
But when I am watching a movie on Netflix, this gets a little confusing. I have been using Dolby Surround. When the movie has Atmos, how do I select the sound mode on the receiver to play Atmos?