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Karimg
Contributor I
March 31, 2023
Answered

Port digital output lacking treble

  • March 31, 2023
  • 13 replies
  • 517 views

Hello,

my recently acquired port seems ti be a little dull when I connect it to myself Audiolab DAC .

I’m a sonos owner for more than 15 years now . I A/B compared myself old sonos connect plug in the COAX1 of my DAC and myself PORT connected to the COAX2 port.
Everything is OK with te connecte but the PORT seems to be muffled. The cymbals sound level is very low compared to the connect sound. With the RCA output there is no problem. I also swapped the DAC input , same problem.

The output setup of both sonos is fixed volume.
 Did you notices this problem and did you fixed it?
Thanks.
 

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Best answer by Corry P

Hi @Karimg et al

We now consider this issue fully resolved. If anyone is still experiencing problems, I recommend they get in touch with our technical support team. 

Thank you for your patience.

13 replies

buzz
buzz
Grand Maestro
March 31, 2023

What is the source of your music?

KarimgAuthor
Contributor I
March 31, 2023

Deezer-->sonos port→ Audiolab Dac-->Naim amp
I have contacted the support.
The root cause is a recent update of the system, Sonos teams are working to solve the problem.
The workaround is to use the RCA outputs.

KarimgAuthor
Contributor I
March 31, 2023

Wait and see.

buzz
buzz
Grand Maestro
March 31, 2023

Thanks for the follow-up.

buzz
buzz
Grand Maestro
March 31, 2023

Literally, a few minutes ago a PORT firmware update was released. While there is no claim that it addresses this issue, it’s worth checking this out.

    KarimgAuthor
    Contributor I
    April 1, 2023

    my current version is the 

    15.2 (nb 72239316) 

    And there is no update available…..

    Morten Caspersen
    Lyricist I
    April 2, 2023

    I have the same problem with my Port in a simular setting. No treble, sounds dull, after the last update 2 days ago. I use a NAS. It must be an issue with the last update.

      Gert_4
      Prominent Collaborator I
      April 2, 2023

      The sound signature on the analog output also, again - again, has changed with this update, and when you adjust the balance control via System, the bass and treble also still changes completely randomly.

      I'm getting a little tired of never knowing how my Port sounds after an update.

       

        SoupNoodle
        Lyricist I
        April 13, 2023

        Same issue here, both on my Schiit Modius and ADI-2 DAC FS components. My ADI detects and warns me that the “Pre-Emphasis Flag” is detected on the SPDIF signal coming form the Port. Pre-emphasis means the highs have been boosted to mitigate potential signal noise, and requires “de-emphasizing” for proper playback. 

        However, the signal from the Port’s SPDIF out is not actually pre-emphasized, so your DAC detects the flag in the signal, kicks in its de-emphasis support, and attenuates the high frequencies (~2–15KHz) leaving you with a muddy sound. Who knows what the code is actually doing, but this is how it manifests in my systems.

        Glad to hear they’re working on a fix, but between SPDIF not working at all on some systems (fixed via recent firmware update), and now this, I’m pretty disappointed. 

         

         

          KarimgAuthor
          Contributor I
          April 15, 2023

          I’m disappointed too.

          No news from Sonos Support since they asked me if “I have an Audio Precision test device, or equipment that can generate Channel Status Bit metadata over SPDIF” 10 days ago…. 

           

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