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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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    Laird M Malamed
    Enthusiast I
    February 25, 2021

    You are a legend Laird. 

    I've got all my fingers crossed that you get something back from Panasonic suggesting they accept the problem is theirs and they intend to fix it. 

    Thank you!

    No news or reply to my providing more info from Panasonic yet though. Fingers crossed indeed.

    Laird M Malamed
    Enthusiast I
    March 4, 2021

    You are a legend Laird. 

    I've got all my fingers crossed that you get something back from Panasonic suggesting they accept the problem is theirs and they intend to fix it. 

    Thank you!

    No news or reply to my providing more info from Panasonic yet though. Fingers crossed indeed.

     

    Acknowledgment but no actions yet:

    “Thank you for contacting Panasonic Consumer Support.
    With regards to your inquiry, your feedback and observations have been noted and passed along to our dedicated team”
     

      madhav
      Lyricist III
      March 11, 2021

      Sonos just put a 13.0 firmware release - @GuitarSuperstar - any possibility to confirm if this resolves multichannel PCM 7.1 to 5.1 downmixing issues when playing a DTS 7.1 sound track converted to PCM 7.1.

      GuitarSuperstar
      Lead Maestro
      March 11, 2021

      @madhav I updated the firmware and played the 7.1 audio test on my DTS demo disc… no change. Both side surround channels play the test tone, but both rear surround channels are silent.

      "Receive with simplicity everything that happens to you." - Rashi
      madhav
      Lyricist III
      March 11, 2021

      Thanks for checking. I guess the firmware fix Sonos were working on according to their CEO for this issue is not a priority.

      madhav
      Lyricist III
      March 11, 2021

      I returned the Panasonic UB820 unfortunately and replaced it with Samsung UBD-M9700 that I got brand new from eBay and Sony UBP-X800M2
      I have two setups

      1. Samsung M9700 + Samsung LSP9T projector + Sonos arc ( 2 subs and 2 surrounds) 

      DTS audio is RE-encoded on the fly to DD 5.1 so no issues with that. Dolby Atmos is passed through to Sonos arc (TrueHD or DD+).

      HDR10+ is supported by M9700 and is supported by LSP9T. No Dolby vision but not a big deal because projector doesn’t support it anyway

       

      1. Sony UBP-X800m2 + LG CX + Sonos arc (1 Sub and 2 surrounds)

      DTS gets converted to LPCM 5.1/7.1 - still have to deal with Sonos firmware bug with 7.1 as above.  Dolby is passed through 

      Dolby Vision is supported for dynamic HDR. LG CX supports Dolby Vision.

       

       


       

       

      iBoyley
      Trending Lyricist I
      March 11, 2021

      The bug that you are referring to is completely seperate the the post that was originally created, there are several other posts relating to the downmixing issue that cropped up since the LPCM update back in november. I would suggest keeping any posts related to it in a more relavant thread specifically raised about that issue

      Surge
      Lyricist III
      April 4, 2021

      So I finally got around to putting in a ticket to Panasonic for this issue, and have received a reply which states the following:

      “As I am aware, the player can only send the multi channel audio to an audio device connected via the secondary DHMI, Optical or Analogue connections (RCA).

      However, I will send your query further to our technical department and will reply to you as soon as I have an answer.”

      Can anyone here confirm if they have successfully gotten multichannel PCM out of the UB820 with the AV HDMI, either using an HD Fury or a different TV? I’m pretty sure what the support agent says isn’t true, but I would like someone to confirm that it isn’t true before I get back to them to state as much.

      GuitarSuperstar
      Lead Maestro
      April 4, 2021

      @Surge My UB820 is connected from the HDMI audio/video out port to the HDFury Arcana and I get multichannel PCM audio playing out of the Arc.

      "Receive with simplicity everything that happens to you." - Rashi
      Laird M Malamed
      Enthusiast I
      April 7, 2021

      @Surge My UB820 is connected from the HDMI audio/video out port to the HDFury Arcana and I get multichannel PCM audio playing out of the Arc.

       

      I too am also getting 7.1 audio from the 820 through a DR 4K HDMI through my LG to my Sonos Arc. The only time I get 2.0 audio is when the source material is in 2.0 format.

       

      After Panasonic asked for more info on my ticket, they have not further responded.

       

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