Problems when creating 5.1 set up

  • 31 July 2020
  • 3 replies

I recently purchased 2 Play One SLs and Flexson adjustable stands - I wanted the Play One SLs to add to my Playbar and Sub to give me Dolby Digital 5.1.


When setting them up (which was a real pain as they simply would not connect to Playbar/Sub existing set up from the app – had to add them to new rooms in the end to get them on the network and then transfer them to ‘living room’ to add to existing kit as rears) I was not getting 5.1 sounds, the rears were simply providing a low level noise and the Sonos app was showing Stereo 2.0.


I have a Panasonic TX58DX900 tv connected to Playbar by optical


TV has SkyQ, BT Ultimate, and Bluray player attached via HDMI


If I attached the optical from SkyQ to Playbar direct (as opposed to the initial set up, of Playbar to TV) I got the 5.1, however, I then miss out on Amazon (app on tv), BT and Bluray being 5.1.


I then did a bit of online digging and found I needed to change TV setting from PCM to Bitstream to get pass-through so all devices feeding to Playbar via tv.


Whilst this has worked in terms of getting 5.1, I get terrible interference (like a Dalek talking) for the first minute or so when I turn the tv on and then again when I go from channel to channel – also, some of the channels have lip sync issues (and some don’t??) – after a minute or so both issues settle down.


Problem is, as soon as I change channel or switch tv off and on again the same problem occurs.


I hope the above makes sense, and if anyone knows what I am doing wrong any help would be much appreciated.

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3 replies

Userlevel 5
Badge +13

Hi @7jason, welcome to the community. We greatly appreciate all the details here and let me help you with your concern. First, it’s nice that you’re getting 5.1 surround sound (Dolby Digital) now. It’s weird on what’s going now with the audio but have you tried connecting it again to other source devices like your SkyQ and if you’ll get the same problem? More details here about Audio and Video are out of sync. Let us know how it goes. Thanks! 


The problems do not occur if I go direct from SkyQ to Playbar BUT and it is a big BUT, I cannot then use the Sonos sytem for BT TV, BluRay Player or Games console - hence why I was using TV as passthrough.

Sonos seems not to be able to creat 5.1 when sent as PCM, though the sound and lyp sync are fine - to get 5.1 I have to set my tv to Bitstream but then I get the interference/lypsync issues?


Userlevel 5
Badge +13

Hi @7jason, thanks for your response and effort. It seems that the problem could be with the TV or it’s settings since it’s okay with your SkyQ. Try to disconnect any other devices connected to your TV except the Playbar to see if the problem will still be there that probably the TV can’t just handle them all. Also, is the audio behind or ahead of the video? If you find that the audio is lagging behind the video, try rebooting your source device (e.g., DVD/Blu-ray player, game console, cable box) and your TV. If the problem continues, contact the manufacturer of the device to see if there is any additional audio processing that can be disabled. There is no setting within Sonos that can correct this issue. If the audio is ahead of the video: Use the “Audio Delay” setting to delay the audio. Drag the slider to increase the sound delay if the audio is ahead of the video.

On iOS or Android:

  1. Open the Sonos app for iOS or Android. From the Settings tab, tap System.
  2. Select the room where the Sonos home theater product and surround speakers are located.
  3. Under Home Theater, tap TV Dialog Sync.

Keep us posted. Always here to help. Thanks!