New Arc, Sub, One SL x 2 home theater surround connected to TCL Series 6. Signal to TV from Apple TV 4K, Arc connected to TV via HDMI/ARC port. TV set to autodetect - TV indicates that it is detecting DD+ signal. Playing content that should be Atmos (have tried atmos movies on iTunes, and also atmos content on netflix (streaming at ultra HD/autodetect). Should (I think) be sending Atmos signal to the Arc. however, cannot verify this. No Atmos logo in the “playing now” screen. When I go into the S2 app, “about my system” it indicates the signal is “Dolby Digital Plus 5.1”. Appreciate your thoughts / experience…. Apologize if I’m missing something obvious here. TY
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