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Hi all,

I'm using a Sonos Arc, Sub, and two Symfonisk speakers as a surround setup. They are connected to my Samsung The Frame TV from 2017 (model UE55LS003). The system is set up correctly in the Sonos app, but I only hear sound from the Arc. The surround speakers (left and right) stay silent — even when playing Netflix content that should support Dolby Digital 5.1.

To be honest, the surround has never worked properly since installation. I recently powered everything down and back on, but the issue remains.

Sonos S2 app version: 80.19.21.
TV connected via HDMI ARC.

What I’ve tried:

  • Verified TV audio output settings (Bitstream + Dolby Digital).

  • Checked grouping in the Sonos app (Arc, Sub, and both Symfonisk are shown as part of the room).

  • Looked for the audio input format in the app but can’t find it anymore.

Questions:

  1. Where can I see the incoming audio format in the latest S2 app?

  2. Is my setup compatible with full surround sound?

  3. Any ideas why only the Arc is playing sound?

Thanks for any help or tips!

I have the same setup as you pretty much. The surround speakers will only play when the content has something to play in those speakers. You will not hear sound all the time. It’s reasonably rare in fact. 
Put your hand on the Sub speaker - you should feel the bass during TV content. 

The Now Playing screen (will show a TV icon when playing TV content) shows the audio output format you’re getting.

Play music on the speakers. Go to Settings - iHome Theatre Room] - Surround Audio, and ensure Music Playback says Full. It it plays in all speakers then they are working fine. 
There is no audio input format on the app - the Arc, Sun and Surrounds will simply play what is sent to them.

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