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Zooming Timeline alters audio synchronization
Ken480 [Avatar]
Member Joined: Oct 27, 2015 01:15 Messages: 51 Offline
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First, a bit of backstory: I use a digital voice recorder and lapel mic to record the audio I use in my work. My cameras' built-in mics record mostly wind noise and not much else, especially if I'm any distance from the camera. So I synch the two audio tracks up in PD14, then mute the audio track attached to the video.

But today, I started having issues with the two tracks suddenly, well, for the lack of a better term, 'desynchronizing' simply by zooming in and out of the timeline. I'm not moving either audio track, just clicking on the + and - icons for the timeline zoom. Doing so causes the two audio tracks to become desynchronized. And the shift between the two depends on how much I zoom in or out.

Sample: I would zoom in to visually line up the two tracks, click on Play, and adjust the audio track from the voice recorder left and right until it synched with the audio track of the audio/video line that is directly from the camera. When I zoom out, they get further and further out of synch.



I tried restarting Win 8.1 to no avail. Anyone have a suggestion?
Ken480 [Avatar]
Member Joined: Oct 27, 2015 01:15 Messages: 51 Offline
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Anyone? Anyone?

Beuhler? Beuhler?

tomasc [Avatar]
Senior Contributor Joined: Aug 25, 2011 12:33 Messages: 6464 Offline
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The digital voice recorder I used several years ago is voice activated as in vox. It stops recording a few seconds after no sound above a certain threshold and starts again when there is. The synchronization is only achievable at one period of time. Some models also playback at a faster speed.

Let us know what the make and model number of the device and the audio format recorded.
Ken480 [Avatar]
Member Joined: Oct 27, 2015 01:15 Messages: 51 Offline
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It's not due to the recorder turning off during times of silence. It's not set up to do that.

It's a function of PD14. When I synch the camera audio with the recorder audio, both play back identically.

But when I zoom in or out on the timeline, the tracks become unsynched.
tomasc [Avatar]
Senior Contributor Joined: Aug 25, 2011 12:33 Messages: 6464 Offline
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I have never had that problem you stated with clips. Once again what is the audio format from your digital cassette recorder??? You might want to convert it to the wav format before placing it on the timeline to see if it helps.
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