Sound glitches/squeaks from specific digital albums (near speaker damaging)!

Answered
Eli Barbie
  • Edited

Hello

 

Running the latest Bluos on my NAD C658 DAC. Today while listening to a digitally downloaded album (Patricia Barber Blue Caffe, FLAC CD-quality, purchased online), on almost every track played, there are loud audio glitches or squeaks that can really cause damage if played loud!

 

I have had these files for a long time and they play perfectly on every other hi-fi device, such as a PC using Foobar2000, or Denon's HEOS. 

 

The same file that causes these glitches also play fine on the NAD C658 using a PC connected to the C658 by SPDIF (optical link). The strange glitches only happen when the same file(s) play using the bluos player (library playback).

 

This is super urgent, as it already happens with two different albums!  I'm attaching a sample file (one track) as a downloadable file to my private Dropbox for the developers to test. 

 

Please see if you can recreate the problem and try to give me some info on how do I identify the "problematic" files, so I can remove them from my library until the bug is fixed. I do not want to cause damage to my speakers (the glitch sound exactly like a back interlink connection, and it is consistent, meaning happening at the exact time queues every time.

 

 

 

Thanks

 

 

 

 

Please 

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Comments

4 comments

Date Votes
  • Official comment
    Tony W.
    Product Support Manager

    EDITOR'S NOTE - DOWNLOAD REMOVED DUE TO COPYWRITE REASONS.

    Hi Eli

    Please see my comments on this thread; https://support1.bluesound.com/hc/en-us/community/posts/360037182673

    I would check files your downloaded...

  • Eli Barbie

    Thank you very much.

     

    I'm not sure if this is the same problem already reported. Please notice the following:

     

    The file is not a CD rip, it is a bit for bit digital copy downloaded from Tidal server. Yes, after redownloading the album, no glitches in the new files. BUT after testing the bad file using a free tool called Audiotester, no errors were found.

     

    BUT, why is bluos producing these extremely loud clicks, which for some reason seems to bypass the volume controller of the C658 and output a full 0db click? Also, I did play the bad files from my Windows 10 pc using Foobar2000 and WASAPI output to the digital input on the C658 and the files are paying smoothly. Only blueos library playback has this problem. 

     

    Can a firmware update fix this very problematic behavior? Cant the bad files are detected and skipped automatically? I will post a youtube video later to demonstrate thus extremely aggressive glitches. It's not exactly a click, it sounds exactly like someone pulled the microphone plug during a loud rock concert. Something like a bad connection. 

    After you check the sample file, I'd appreciate if you could tell me if is there a way to scan my 24,000 FLAC files collection and identify other similar bad files as the one uploaded

     

    Thanks

     

     

     

     

     

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  • Eirik Anderssen

    I second this, playing on a Vault 2i through Coax to Dynaudio Focus 20 XDs. Happens if I switch source while playing back a track, or randomly when starting a track. It does sound like a potential disaster to my tweeters, but so far so good. Please look into this, it's not user error and everything else is connected/done according to manuals etc...

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  • Tony W.
    Product Support Manager

    Hi Eirik

    Whenever we have seen your issue (and it is not often), it has been a problem with the DAC switching bit rates and sample rates. Contact Dynaudio.

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