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HarvG
Trending Lyricist I
August 13, 2022

Sonos Arc and Oppo UDP-203 - Only Getting Stereo PCM 2.0

I've just connected the Sonos Arc to my LG 65EF9500 TV via HDMI ARC (eARC not available on the LG). When using my Amazon Fire Stick with a movie encoded with Dolby audio, the Sonos app shows Dolby Digital 5.1, which is all I expect without eARC on the LG TV.

However, I also have an Oppo Blu-ray player (UDP-203) connected to my Denon receiver (AVR S920W) via HDMI, and the Denon is connected to the LG TV also via HDMI.

I have the Denon receiver set to “pass through” for HDMI so that the the Oppo signal goes to the LG even with the Denon switched off. (I have also taken it out of “pass through” mode and played a Blu-ray disc with the receiver on - same results noted below.)

When I watch a Blu-ray disc encoded with Dolby surround audio on the Oppo, I cannot get the Sonos Arc to recognize the audio properly, and the app shows Stereo PCM 2.0. How do I get it to recognize Dolby Digital 5.1 like it does with the Fire Stick as noted above?

Is there a setting on the Oppo or the Denon I need to change?

Thanks much!

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HarvGAuthor
Trending Lyricist I
August 14, 2022

I’ve just come across this in the user-manual (page 57):

Can you switch the DVD-Audio Mode to ‘DVD-Video’ and see if that makes a difference.

Already had that set to DVD-Video - no change.

 

Would it make any sense to connect the Oppo directly to the Sonos to see how the sound is processed, or is that not practical/feasible?

 

Ken_Griffiths
Ken_Griffiths
August 14, 2022

I’ve just come across this in the user-manual (page 57):

Can you switch the DVD-Audio Mode to ‘DVD-Video’ and see if that makes a difference.

Already had that set to DVD-Video - no change.

 

Would it make any sense to connect the Oppo directly to the Sonos to see how the sound is processed, or is that not practical/feasible?

 

Yes it won’t hurt to try that and see what audio format you get - if it’s still stereo, my thoughts are to perhaps also try a different HDMI cable.

HarvGAuthor
Trending Lyricist I
August 14, 2022

I’ve just come across this in the user-manual (page 57):

Can you switch the DVD-Audio Mode to ‘DVD-Video’ and see if that makes a difference.

Already had that set to DVD-Video - no change.

 

Would it make any sense to connect the Oppo directly to the Sonos to see how the sound is processed, or is that not practical/feasible?

 

Yes it won’t hurt to try that and see what audio format you get - if it’s still stereo, my thoughts are to perhaps also try a different HDMI cable.

Connecting the Oppo directly to the Sonos via HDMI resulted in no sound.  Will have to consider a new cable, but the cable I’m currently using is successfully passing a 4K HDR video signal to the LG.

jgatie
jgatie
August 14, 2022

Connecting the Oppo directly to the Sonos via HDMI resulted in no sound.  Will have to consider a new cable, but the cable I’m currently using is successfully passing a 4K HDR video signal to the LG.

 

The Oppo doesn't put out an ARC signal, so it's never going to work connected directly to the Arc.

    Ken_Griffiths
    Ken_Griffiths
    August 14, 2022

    @HarvG 
    Ah yes of course jgatie is right, (how stupid I am🤷‍♂️)… you need to return the audio to the Arc over an HDMI-ARC connection, but you could use the optical-to-HDMI adapter (that came with your Arc) plugged into the Oppo, but that really somewhat defeats the object of what we were trying to discover and that’s if the audio-out over its HDMI connection is Stereo, or Dolby Digital 5.1

    Anyhow, you may aswell try it with the Optical-to-HDMI adapter and see what audio you get from that port. It may at least show the audio out settings are correct even if it’s going through a different port.

    Ken_Griffiths
    Ken_Griffiths
    August 15, 2022

    @HarvG,

    Not sure if this may help, but whilst trying to find an answer to this one, I came across this comment on the Oppo resources website, about Dolby Digital Audio Output…

    "Be sure to turn off all internal decoding in the OPPO player. (Choose Bitstream out AND be sure to turn off SECONDARY AUDIO feature)”.

    If still no joy, then Oppo customer support maybe the next best step and their contact link is here:

    https://www.oppodigital.com/ContactUs.aspx

      HarvGAuthor
      Trending Lyricist I
      August 15, 2022

      @HarvG,

      Not sure if this may help, but whilst trying to find an answer to this one, I came across this comment on the Oppo resources website, about Dolby Digital Audio Output…

      "Be sure to turn off all internal decoding in the OPPO player. (Choose Bitstream out AND be sure to turn off SECONDARY AUDIO feature)”.

      If still no joy, then Oppo customer support maybe the next best step and their contact link is here:

      https://www.oppodigital.com/ContactUs.aspx

       

      Thanks again Ken for all of your time and analysis - I already have Secondary Audio off on the Oppo with Bitstream selected. Still need to try connecting the Oppo directly to the Sonos using an optical cable just to see what the result is. Remarkable how challenging this has turned out to be!

        GuitarSuperstar
        Lead Maestro
        August 15, 2022

        @HarvG On The Batman Blu-ray, if you set the audio track to the French or Portuguese Dolby Digital 5.1 track rather than the English Dolby Atmos or Dolby TrueHD track, what audio format is played through the Arc?

        "Receive with simplicity everything that happens to you." - Rashi
          HarvGAuthor
          Trending Lyricist I
          August 15, 2022

          @HarvG On The Batman Blu-ray, if you set the audio track to the French or Portuguese Dolby Digital 5.1 track rather than the English Dolby Atmos or Dolby TrueHD track, what audio format is played through the Arc?

          Thanks for the suggestion - I’ve already tried several Blu-ray discs (including The Batman) with a foreign language track in DD 5.1 and got the same result from the Sonos - Stereo PCM

          HarvGAuthor
          Trending Lyricist I
          August 15, 2022

          @HarvG,

          Not sure if this may help, but whilst trying to find an answer to this one, I came across this comment on the Oppo resources website, about Dolby Digital Audio Output…

          "Be sure to turn off all internal decoding in the OPPO player. (Choose Bitstream out AND be sure to turn off SECONDARY AUDIO feature)”.

          If still no joy, then Oppo customer support maybe the next best step and their contact link is here:

          https://www.oppodigital.com/ContactUs.aspx

           

          Tried working with a Sonos live rep on the issue, which did not result in anything actionable. So, have just sent an email to Oppo - fingers crossed.

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