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Audio Latency Issue
Hi,
I’m having a problem with drifting audio in the timeline. Video plays back fine but the audio output seems to lag behind the video during playback. If I stop the playhead on the timeline in the ‘middle’ of a large audio clip, then hit play again, the audio starts up further along in the audio clip then where it stopped. I’ve had this problem before but never in FCP, only in a legacy AVID Express System on a Powermac 9600.
It’s not consitent latency/drift, shorter audio clips don’t seem to have the same problem. I thought it might be disk related but all of the files are stored on a HMV-400 GB hooked up via dual channel SCSI to an ATTO UL3D, I get around 120 MB/s read and 80 MB/s write, and I have 2.5 GB or RAM which should be enough. I have run software update and all my permissions are correct. Trashing FCP prefs has no effect either.
I should add that I’m using my “Built In Audio” output for Playback Output.
Thank you all!
Kai
PS. Here’s my info:
G5 Dual 2.0 GHz
2.5 GB RAM
160 GB internal HD (only 60 GB used)
OS X 10.4.2
Final Cut Studio (FCP 5.0.2)
ATTO UL3D -> HMV-400 GB SCSI -
3 Replies
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Are you using an output device like a Kona or Io? This was a problem I had in earlier versions of FCP (3) with Digital Voodoo products….
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I have a Decklink SP but it’s not working Properly. That’s why I am using built in audio as my output for playback. I am working with BMD to get the problem resolved. I tried unseating the card and removing the drivers to see if maybe IT was causing the problem but that didn’t change anything. Still the strange audio drift.
Thank you,
Kai
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One last thing I tried and it fixed the problem.
UNISTALL ALL DECKLINK SOFTWARE!
I only removed the quicktime component before.
Go figure…
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