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Comodore
Contributor I
October 24, 2020

LGc9+Sonos Arc

After not being able to solve the massive sound delay between ps4->lgc9->playbase and the new ps5 not having a optical out to bypass the problem i have one question:

 

Will ps5->C9->sonos arc via earc have zero sound dealy when playing dolby 5.1/atmos?

 

I am willing to pay 800€ again for a system outdated today but i only use it fo gaming so thats crucial for me

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    23 replies

    controlav
    controlav
    Lead Maestro
    October 24, 2020

    If you have a delay with the PS4, chances are very good that you’ll have the exact same problem with the PS5 (as its the TV adding the delay). However a firmware update for the C9 will probably help on both systems.

    Author of the leading independent Sonos apps for Android, MacOS, iOS, Windows and Xbox.
      ComodoreAuthor
      Contributor I
      October 24, 2020

      Ok then sonos is dead for me. Im sick of waiting for updates that never come. A have a 2k€ tv and a 2k€ soundsystem and it wont work together

        ComodoreAuthor
        Contributor I
        October 24, 2020

        I cant be rhe only person in the world with this setup....

        starlan
        Enthusiast I
        October 25, 2020

        I don’t have a Playbase but on my Sonos Arc I get zero delay when connected via HDMI from my PS4 to my LG CX. I would expect the PS5 via eARC to be the same. Why not wait for both to be out and try and if not to your satisfaction then return the Arc? 
         

        The LG C9 or CX OLED TV, PS5 and Sonos Arc is going to be a very common setup I would assume.

        Ken_Griffiths
        Ken_Griffiths
        October 25, 2020

        I cant be rhe only person in the world with this setup....

        Have you tried setting the ‘Settings/Sound/Sound Out" on the C9 WebOS to ‘pass through’ on the optical port?

        ComodoreAuthor
        Contributor I
        October 25, 2020

        I tried every workaround imaginable.

        Ken_Griffiths
        Ken_Griffiths
        October 25, 2020

        I tried every workaround imaginable.

        I have the LG C9 (running firmware v04.80.03) but with the older PlayStation 3 (slim version) connected over HDMI and the Sonos Arc (connected to the eARC (port (HDMI-2) set to pass-through) and all A/V, including Dolby TrueHD, runs in perfect lip-sync here?

        starlan
        Enthusiast I
        October 28, 2020

        Oddly enough I starting noticing some sync issues yesterday too. I was using the built-in streaming apps. I’m using a CX instead of a C9 and have eARC enabled and have digital audio out set to Passthrough. The audio is ahead of the picture. I can compensate some with the tv sync setting on the Arc but struggling to get it just right. 
         

        I thought eARC was supposed to eliminate sync issues?

        Ken_Griffiths
        Ken_Griffiths
        October 28, 2020

        Oddly enough I starting noticing some sync issues yesterday too. I was using the built-in streaming apps. I’m using a CX instead of a C9 and have eARC enabled and have digital audio out set to Passthrough. The audio is ahead of the picture. I can compensate some with the tv sync setting on the Arc but struggling to get it just right. 
         

        I thought eARC was supposed to eliminate sync issues?

        Yes, lip-sync should be eliminated according to this comparison chart (attached) which I found online, but the Sonos Arc can only play the audio when it receives it from the LG TV.  

        The LG CX model is relatively new so maybe a firmware update will resolve the matter, but note the LG TV’s have their own Lip-sync features available too, as mentioned in this link:

        https://www.lg.com/us/support/help-library/lg-tv-av-sync-adjustment-CT10000018-1387832191561

        I’ve seen other lip-sync matters reported with the LG CX TV - one example with another brand of sound-bar is mentioned here:

        https://www.avforums.com/threads/audio-delay-with-lg-cx.2283114/

        Note: the eARC pass-through option on the TV port will have no bearing on the in-built TV Apps.

          starlan
          Enthusiast I
          October 28, 2020

          Thanks for the response. Just to test it out I unplugged the Arc and tried the built in speaker  on the CX and oddly it was the same and had sync issues with the picture. I’m not sure what’s going on there. So I don’t think there is an issue with the eARC but I swear the audio and picture aren’t in perfect sync when people talk (although sound effects seem to be fine). Maybe I’m just losing my mind.

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