• DaVinci Resolve

  Audio playback jitter

  Posted by Nick Anderson on December 5, 2011 at 4:50 pm

  Has anyone encountered the problem of playback reference audio? Which the audio became more and more jittering, clicking sound appears once a second, when playback with video.
  It’s 12 core macpro, with fast raid6 (r/w speed above 600MB/s). Video is rendered dpx sequence with NO grading.
  Anyone has a solution on this, please don’t hesitate to tell.

  Eric Johnson replied 14 years, 5 months ago 6 Members · 11 Replies
• 11 Replies

• 

  Michael Cinquin

  December 5, 2011 at 7:54 pm

  Same problem here, whatever daVinci version. From FCP, with same sound file, same video card, no problem.
  The biggest clicks can be heard with classical music (Bach…)

  Michael Cinquin

  Final Cut Pro – Avid Media Composer editor
  DaVinci – Color – Baselight colorist
  Color profiles for Color
  http://www.michaelcinquin.com/tools : tools for FCP | Color | RED | subtitles | Cinema Tools | Timecode – Keycode calculator
• 

  Nick Anderson

  December 6, 2011 at 4:54 am

  So, it is a bug. Not some mysterious hardware/software configuration problem…
  Hope people at BM will notice this, and solve it in the future release
• 

  Vivek Vedagiri

  December 6, 2011 at 6:48 am

  Hi Nick,

  Is this 48KHz audio? What is your video frame rate set to?

  Vivek Vedagiri
  Blackmagic Design
• 

  Nick Anderson

  December 6, 2011 at 7:38 am

  Video framerate is 24fps
  Audio is 16bits Big Endian, Stereo, 48.000 kHz
• 

  Fred Ricci

  December 6, 2011 at 12:32 pm

  Hi there.
  I ve seen this too, specially in long timelines.

  NEHALEM OCTO 2,26
  GT 120
  GTX 285
  8 Giga RAM
  SOFT RAID 8 Tera
  Wave
  Eizo 243 + Hdlink displayport
  DAV, COLOR, FINAL CUT AND MEDIA COMP
• 

  Ola Haldor voll

  December 6, 2011 at 1:31 pm

  I sometimes get this if I
  – have Safari or any other browser running
  – iTunes playing

  I think what’s happening is my receiver (I’m using a Logitech Z906 speaker system) is getting mixed signals. (yup, I said that!). Switching the system off, quitting the apps, and switching the speaker system on again usually solves the problem.
• 

  Nick Anderson

  December 6, 2011 at 1:41 pm

  Exactly
• 

  Eric Johnson

  December 8, 2011 at 3:27 am

  Are you guys playing the audio off the same drive as picture? I put in a 2nd internal and use that for an audio only drive.

  I still get playback issues if for whatever reason I’m overtaxing or there are a bunch of nodes, but overall much better performance.
• 

  Fred Ricci

  December 8, 2011 at 7:14 am

  I’ll try that.

  NEHALEM OCTO 2,26
  GT 120
  GTX 285
  8 Giga RAM
  SOFT RAID 8 Tera
  Wave
  Eizo 243 + Hdlink displayport
  DAV, COLOR, FINAL CUT AND MEDIA COMP
• 

  Nick Anderson

  December 8, 2011 at 12:30 pm

  I tried that the first moment I noticed the problem, theres some tiny improvements, but still clicks like hell.
  Two media drives are both separate from system drive, and both 10 disks raid drive.

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