Vault 2 and ATC CDA2 preamp sample rate switching issue.

Answered

Richard Liggins

• September 11, 2024 13:31
• Edited

Hi, I currently have a Vault 2 connected to an ATC CDA2 Mk2 via co-axial cable powering a pair of ATC SCM40A speakers. 

It's a fine combination that sounds excellent, but when I have a random playlist running I notice a burst of digital noise whenever the sample rate of the track changes to higher resolution tracks from CD FLAC rips or MP3 tracks. It doesn't seem to happen going from an HR track to any other sample rate, just when anything above 44.1Khz comes up.

There are no issues sequencing tracks of the same rates or filetypes, and the issue doesn't occur when connecting via analogue. 

I've tried the settings in the Audio menu to no success.

Any ideas?

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• Official comment

  

  Seppi Evans

  Hi-Res

  • September 11, 2024 13:56

  Unfortunately this is something that happens with some DACs when the bitrate changes. I had a Cyrus device with integrated DAC and it made an alarming noise when the bitrate changed either up or down.

  You have already done pretty much everything I would suggest as below….

  See if there is any firmware updates available for the ATC CDA2 Mk2, then see if there is an audio clock trim setting available in the BluOS App and toggle that, finally you could try using the analogue outputs on the Vault as these won’t suffer.
• 

  Richard Liggins

  • September 11, 2024 14:24
  • Edited

  Thanks for the reply.

  Unfortunately I've tried those avenues. I did wonder if it was "just one of those things".

  I prefer the sound of the ATC DAC to the Vault.

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