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johnr44409788
johnr44409788
Participating Frequently
May 3, 2017
Answered

Clean Mac OS Install latest Audition -- choppy playback

  • May 3, 2017
  • 1 reply
  • 804 views

Was suddenly having choppy / stuttering / dropouts playback in Audition, so I did a clean Mac OS El Capitan install onto another drive, with only Audition installed.  Nothing else running or installed at all.

The playback will stutter every few seconds using a Blackmagic Decklink PCI card for Audio out in using the latest Audition.

Quicktime player is fine, no issues.  I then installed Final Cut Pro X just to check and the playback is fine there, too.  So it's something in the Adobe world.

Did PRAM and SMC fixes to no effects.  Again, this is a completely clean install.  The buffer size is max size.

Okay, just wondering if anyone else is having the problem.  Thanks.

    This topic has been closed for replies.
    Correct answer Bob Howes

    The upgrade to the latest macOS Sierra did not improve the choppy playback.  Again this is only in Adobe products using the Blackmagic Declink PCI card.  Other quicktime playback has no issue.


    Stuttering is usually either a buffer size issue or a wordclock problem.  Since you have the buffer set to the largest possible size (nobody should have to do that) it might be worth checking if there's some kind of mismatch in wordclock--for example the Blackmagic card set to 48k for video while Audition is on 44.1k for standard audio or something.

    The other thing to check for is that, despite what you say about a clean install, could there be something else running in background using some of the audio processing.  I'm afraid I could tell you how to check this in Windows but not on a Mac.

    1 reply

    ryclark
    ryclark
    Participating Frequently
    May 4, 2017

    I am not sure that the Blackmagic Decklink cards will act as audio only interfaces without video being present. The problem could be due to lack of proper sample rate Wordclock in order to drive Audition's playback engine.

      johnr44409788
      johnr44409788Author
      Participating Frequently
      May 5, 2017

      Thanks for the info.  I have tried with video and audio with the same choppy playback every 5 seconds or so.  I am currently going to update to mac OS Sierra to see if updating the OS will solve the issue.  Thanks.

      johnr44409788
      johnr44409788Author
      Participating Frequently
      May 5, 2017

      The upgrade to the latest macOS Sierra did not improve the choppy playback.  Again this is only in Adobe products using the Blackmagic Declink PCI card.  Other quicktime playback has no issue.

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