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Audio Drifting Out Of Sync – CS6.0 and AJA T-Tap
We have a new iMac based Premiere Pro editing system. It’s been working great. Very fast. But there’s one issue that we haven’t been able to solve.
When playing back footage in the timeline, the audio/video slowly drift out of sync. When I say “slowly”, I mean that it drifts out of sync after playing for 10-20 seconds.
We did check to make sure the footage matches the same sample rate as the sequence. It does (48k). We didn’t check to make sure drop-frame settings are correct though. How would we go about doing that? (although I doubt this is the issue)
I think the problem is that we don’t fully understand all the settings in Premiere. We connected an AJA T-Tap converter (Thunderbolt to HDMI) so that we can view on a consumer plasma. I “think” that might be causing the issue. When we first setup the system, we were able to see/hear audio out of the plasma display. It worked perfectly. But now we’re not using the monitor and would like to just edit while viewing on the iMac’s screen and iMac’s speakers. I think that it’s still trying to send the video to the T-Tap and that’s throwing things out of sync.
Can anyone tell us how to get to the various settings windows so we could check to make sure everything is set correctly? (Sorry for such a newbie question)
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Sony EX3, Canon 5DM2, Sachtler tripod – 20+ years as a videographer/editor
Experienced with Apple products, Final Cut Studio, Adobe Creative Suite, MOTU Digital Performer, Flip4Mac, etc… -
1 Reply
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Hey Mitch. Did you ever get to the bottom of this? I’m experiencing a similar problem with a similar set-up. Premiere Pro CS6 on a MacBook Pro retina. I use a T-Tap to run a signal to a LCD client monitor. The first thing I noticed is that the audio out of my mac (wanting to run it through a little board) is a couple hundred milliseconds ahead of the video from the T-Tap. No problem. I picked up a little delay unit to compensate.
Even still, over time the video starts to fall behind. I suspect it’s not the delay unit because it’s staying in sync with my Program window. Only the LCD drifts behind. A double-tap of the space bar obviously fixes it. but that’s no solution.
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