If you activate the eARC option on LG OLED evo C4 (2024 model) the native DD+ 5.1 audio is sent from the Apple TV 4K gen3 streaming Apps to the Sonos ARC soundbar in Multichannel PCM 5.1 format with loss or little presence of surround effects and poorly reproduced central voice, while if you deactivate the eARC option on the TV (therefore keeping the less performing ARC transmission) the audio reproduced by Sonos ARC is the native DD+ 5.1 with the surround and central voice effects present and well reproduced...using the smart TV apps downloaded from the LG store the audio in eARC passes to the Sonos ARC soundbar correctly and is faithfully reproduced in DD+ 5.1...is there anything that can be done to avoid disabling eARC, which results in the failure to play Dolby Atmos streams ???...
Not while using the Apple TV 4K. It uses Dolby MAT to play Dolby Atmos and 5.1 audio. Multichannel PCM is less compressed so it requires you to increase the volume to hear the more quiet sounds.
If you don’t like the way Multichannel PCM audio sounds, I suggest you use a different streaming device like a Roku Ultra or Nvidia Shield Pro.
...I agree with you, but the result of the transcoding is terrible...you can create a compressed audio from a native uncompressed one, but not vice versa...it would be enough to add the audio passthrough option to maintain the formats native without any transcoding, in my opinion very harmful...anyway, thanks for the information...
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