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studiomatthewbrooks
Contributor I
November 17, 2020

LG C9 + Arc + UB820 / Multichannel PCM for DTS Blu-Ray discs

  • November 17, 2020
  • 344 replies
  • 32087 views

I’m running an LG C9 with a Panasonic UB820 Blu-ray player, Sonos Arc + Sub gen 3 + One SL surrounds. The lack of DTS support on the Arc has been frustrating for non Dolby encoded Blu-ray discs, so I have been eagerly awaiting the multichannel PCM update.

It’s finally arrived (thanks, Sonos!) and I tried playing a DTS encoded Blu-ray and… no dice. Still stereo PCM 2.0. Has anyone running a similar set-up managed to get 5.1 PCM output from the Arc?

The C9 supports eARC and multichannel PCM, I’m using 48gbps HDMI cables that support up to 8k60Hz, all of the devices are up to date, I have the C9 set to PCM with eArc enabled, DTS output set to PCM on the UB820… I’m really at a loss here. Any ideas or suggested settings?

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    344 replies

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    iBoyley
    Trending Lyricist I
    December 21, 2020

    I have a Sonos Arc and UB820, and I get multi-channel LPCM audio playing through my Arc from ALL of my DTS-HD Master Audio Blu-ray discs. More than likely, the problem is your TV, HDMI cable, or TV settings.

    Thanks for all your suggestions! I have a LG CX, so therefore cannot be the TV! HDMI cable has never produced any issues so i don’t think its that either so it HAS to be something relating to the settings.

     

    Panasonic settings:

    All audio settings are set to Bitstream with the exception of DTS which is set to PCM as you suggest. Secondary audio is turned off. I also have surround sound encoded or whatever it is enabled, i presume this is correct?

     

    TV settings:

    Output HDMI ARC (Automatic)

    Digital Sound: Passthrough 

    eARC: On

      -shak-
      Lyricist II
      December 21, 2020

      Thinking out loud - if people are getting multi channel LPCM using Switch/PS4 etc with the C9 and Arc, then doesn’t that mean the issue must be with UB820 or the type of PCM the UN820 is sending out?

       

      If I get the chance I will try this using a Samsung tv in the other room. I think it has ARC (not eARC) but hoping I’ll at least be able to see if UB820 is sending 5.1 PCM or if it’s still 2.0

      iBoyley
      Trending Lyricist I
      December 21, 2020

      I spoke to Sonos support this morning and they think LG is to blame, pointing me to this article

       

      LG CX DTS Incompatability

        Silverthorn
        Prodigy II
        December 21, 2020

        I spoke to Sonos support this morning and they think LG is to blame, pointing me to this article

         

        LG CX DTS Incompatability

         

         

        Wouldn't be surprised. Everyone is looking to streaming which has pretty much become Dolby ? Sony is still  supporting DTS I believe.

        "I saw the Stooges and the MC5"
        GuitarSuperstar
        Lead Maestro
        December 21, 2020

        I spoke to Sonos support this morning and they think LG is to blame, pointing me to this article

         

        LG CX DTS Incompatability

        If the UB820 is set to convert the DTS audio to PCM before it passes through the LG to the Arc, then the DTS incompatibility problem with the LG TV shouldn’t be an issue.

        "Receive with simplicity everything that happens to you." - Rashi
        -shak-
        Lyricist II
        December 21, 2020

        I spoke to Sonos support this morning and they think LG is to blame, pointing me to this article

         

        LG CX DTS Incompatability

        If the UB820 is set to convert the DTS audio to PCM before it passes through the LG to the Arc, then the DTS incompatibility issue with the LG TV shouldn’t be an issue.


        That’s what I was thinking. Whole point of setting UB820 to PCM was to get round DTS incompatibility with LG and Sonos.

        Problem seems to be either UB820 not able to send full 5.1/7.1 channels as PCM, or it’s detecting something with LG HDMI connection and defaulting to 2.0

        iBoyley
        Trending Lyricist I
        December 21, 2020

        Should be possible according to this link

        GuitarSuperstar
        Lead Maestro
        December 21, 2020

        I spoke to Sonos support this morning and they think LG is to blame, pointing me to this article

         

        LG CX DTS Incompatability

        If the UB820 is set to convert the DTS audio to PCM before it passes through the LG to the Arc, then the DTS incompatibility issue with the LG TV shouldn’t be an issue.


        That’s what I was thinking. Whole point of setting UB820 to PCM was to get round DTS incompatibility with LG and Sonos.

        Problem seems to be either UB820 not able to send full 5.1/7.1 channels as PCM, or it’s detecting something with LG HDMI connection and defaulting to 2.0

        The UB820 can send 5.1/7.1 channel PCM. It’s more than likely a handshake issue with the LG and UB820 or the LG and the Arc.

        "Receive with simplicity everything that happens to you." - Rashi
        iBoyley
        Trending Lyricist I
        December 21, 2020

        Here are my settings - would a 2.1 cable be required for this? That’s the only thing  pretty sure I don’t have 

         

        TV sound settings:

        DTV audio setting: Auto (options are MPEG, Dolby Digital, Dolby Digital Plus, HE-AAC and Auto)

         

        HDMI input audio format: Bitstream (other option is PCM)

         

        Digital sound out: Passthrough (options are PCM, Auto or passthrough)

         

        eArc enabled 

         

        TV Device connection settings:

        Auto device detection enabled 

        SIMPLINK (HDMI-CEC) enabled 

        Auto Power Sync enabled 

         

        UB820 settings 

        Dolby audio Bitstream

        DTS/DTS-HD PCM

        MPEG audio PCM

        BD-Video Secondary Audio Off

         

        Downmix surround encoded

         

        Settings for high clarity sound both outputs are set to automatic 

         

         

          GuitarSuperstar
          Lead Maestro
          December 21, 2020

          Here are my settings - would a 2.1 cable be required for this? That’s the only thing  pretty sure I don’t have 

           

          TV sound settings:

          DTV audio setting: Auto (options are MPEG, Dolby Digital, Dolby Digital Plus, HE-AAC and Auto)

           

          HDMI input audio format: Bitstream (other option is PCM)

           

          Digital sound out: Passthrough (options are PCM, Auto or passthrough)

           

          eArc enabled 

           

          TV Device connection settings:

          Auto device detection enabled 

          SIMPLINK (HDMI-CEC) enabled 

          Auto Power Sync enabled 

           

          UB820 settings 

          Dolby audio Bitstream

          DTS/DTS-HD PCM

          MPEG audio PCM

          BD-Video Secondary Audio Off

           

          Downmix surround encoded

           

          Settings for high clarity sound both outputs are set to automatic 

           

           

          I don’t know if a 2.1 cable would make a difference, but it wouldn’t hurt to try.

           

          For High Clarity Sound, I have both set to HDMI Only.

           

          I would also try changing the Digital Sound Out on your TV to Auto or PCM and see if that makes a difference.

          "Receive with simplicity everything that happens to you." - Rashi
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