I have Sonos ARC, Amazon Fire Stick with 4K (using Tomorrow War as a test which is Atmos content), and LG 65UP8000 (2021 model with eARC). In LG audio settings, Sound Out = HDMI (ARC) Device, eARC Support is toggled on, Digital Sound Output = Pass Through (other options are Auto and PCM). In FireStick 4k Settings, i have Surround Sound set to Best Available (Plays best audio format based on your connected HDMI device and content being played. Support Dolby Atmos, Dolby Digital Plus, Dolby Digital, and PCM). When i play Tomorrow War, the S2 app shows the Audio Format is Stereo PCM, and i don't know why. I called Sonos support, and they basically said the issue is on the TV side. But, I enabled the audio settings to allow me to stream Atmos content. Does anyone know why I am not getting Atmos audio? or why im not even getting Dolby Digital but rather Stereo PCM?
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