So I have an Apple TV 4K(2021) Sony x91j and my soundbar is a LG75QR 5.1 channel. Apple TV plugged in tv and soundbar plugged in eARC. So watching Netflix , Disney plus etc I would get a pound static pop sound when I’m going through the movies and if I start or exit out of a movie. Doesn’t happen when I watch Netflix through my tv set or if I’m using my ps5. I have the soundbar and Apple TV using 2.1 hdmi cables . EARC is hdmi 2.1 but the hdmi Imput the Apple TV is 2.0, read that 2.1 isnt needed. Settings on apply tv is Dolby Atmos when available and I even tried doing Dolby 5.1 but it did the same result. I even brought back the soundbar and for a new unit thinking I had a dud.
Great question my Apple TV sending pcm signals on my and is Messing up my soundbar. I get a loud static noise when I exit out of an app or flip through movies on Netflix . I have a lg s75qr and when I look at the app it’s says pcm . When I watch the Netflix etc on naive app on Sony tv says Dolby and I don’t have that sound happening so it’s the Apple TV