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Richardbowser

can anyone help me please? I have a Sony tv KD-65AG8BU and would like to upgrade my Sonos playbar to a Sonos arc but cannot find a definitive answer as to whether the tv will support or pass through Dolby Atmos to the arc??

Many thanks

richard

Win_88

Hi

Since your TV doesn't have eARC, it won't pass-through Atmos signal as it requires more bandwidth.

Win_88

royabrown2

@Win_88

Can we please knock this misapprehension on the head once again? 😢

https://en.wikipedia.org/wiki/Dolby_Atmos

Because of limited bandwidth and lack of processing power, Atmos in home theaters is not rendered the same way as in cinemas. A spatially-coded substream is added to Dolby TrueHD or Dolby Digital Plus or is present as metadata in Dolby MAT 2.0, LPCM like format. This substream is an efficient representation of the full, original object-based mix. This is not a matrix-encoded channel, but a spatially-encoded digital signal with panning metadata. Atmos in home theaters can support 24.1.10 channels, it also can do up to 118 dynamical simultaneous objects with 10 bed channels and uses the spatially-encoded object audio substream to mix the audio presentation to match the installed speaker configuration.

In order to reduce the bitrate, nearby objects and speakers are clustered together to form aggregate objects, which are then dynamically panned in the process that Dolby calls spatial coding. The sound of the original objects may be spread over multiple aggregate objects to maintain the power and position of the original objects. The spatial resolution (and hence the strength of the clustering) can be controlled by the filmmakers when they use the Dolby Atmos Production Suite tools. Dolby Digital Plus has also been updated with Atmos extensions

My emphasis on that last sentence.

But ARC can pass the (lossy) Atmos encoded in DD+ perfectly well; it’s only the lossless Atmos in Dolby TrueHD that needs eARC .

My favourite bedtime reading is a Sony product manual…