In the Sonos Arc Sonos system info screen in the app; what’s the difference between and what is the better sound?
-Dolby Atmos (Truehd)
eArc mode Auto
Dig output audio Pass-through
and
-Dolby Atmos
eArc mode Auto
Dig output audio Auto
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What content are you testing? And from what device?
4K Blu-ray played on Sony X700 4K player
More than likely you are getting the exact same audio. On Blu-ray Discs, you only get Dolby Atmos audio from a Dolby TrueHD soundtrack. I would just leave the setting on passthrough.
Another way of checking the audio is by pressing the Display button on the Sony remote. It should display “Dolby TrueHD” with either setting.
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