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Old June 22nd, 2009, 10:33 AM   #1
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How to slow down audio by 0.01% for 5D Sync?

I saw the Zacuto tutorial on how to slow down the audio to 99.9% to sync external audio from the H4n to the 5D2. Is that possible with Vegas?
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Old June 22nd, 2009, 11:31 AM   #2
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Hold down the CTRL key and resize the audio to the proper length.
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Old June 22nd, 2009, 11:47 AM   #3
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Ed: How do you control a 0.1% length reduction via ctrl+mouse?
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Old June 22nd, 2009, 12:06 PM   #4
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My assumption was that the length would also appear "short" and the video would be a longer event and you'd basically match them up. I was also guessing that it might not be exactly .01%.

However, for another option, there's also a "Time Stretch" effect. But I'd just hold down the CTRL key and adjust. Test it out, if it's still off, hold down the CTRL key and adjust again until it's right.
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Old June 22nd, 2009, 12:08 PM   #5
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I agree with Edward.
I've used the Ctrl+drag feature numerous times and it's a great tool !!
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Old June 22nd, 2009, 03:58 PM   #6
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With both audio track lined up at the start go to the end of the track and zoom in and you should be able to see how much the drift is. Hold your mouse cursor over th end of your new track and hold down the CTRL key. You'll see the "~" symbol appear. Move your mouse left or right until it lines up with the original track and they will now be in sync.

I use a trick I came up with where I find an event at the end of the recording and create a loop region in the area where the new audio track drifts from teh original. Then I drag the loop region to the end of teh new track and I know exactly how much it needs to be altered. This way I'm not just guessing. I usualy zoom in and out multiple times to find and exact spot and it works like a charm.
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Old June 22nd, 2009, 04:42 PM   #7
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If you use NeoScene or other Cineform tools, it is conformed automatically. Original 5D conversions in Cineforms resulted in dead track at the end, based on length of capture. I would have to do the same drag to lengthen track. Worked fine.
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Old June 23rd, 2009, 04:50 AM   #8
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Yes I use Neoscene to get the avi for editing within Vegas. I had the impression that I will need to sync the audio from the H4n if I drag it onto the timeline directly.

Reason is I record a whole chunk from the H4n and match it to several clips in post. This is very tedious for event use.

Chris, so you mean that I do not need to do it since I use Neoscene? Therefore only FCP users who drag the files in directly or convert to Prores will need it?
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Old June 23rd, 2009, 08:22 AM   #9
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Ahh! I didn't realize the audio track would appear as a shorter segment than the video track.. Then yes, the ctrl+drag will work perfectly if you have snapping enabled. I use NeoScene so I guess I'm a bit oblivious to this..
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