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Old 04-03-2008, 02:09 PM
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PaulV PaulV is offline
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Join Date: Nov 1998
Location: Avid, San Francisco
Posts: 302
Default Re: Tick-based sync solution?

Hi there,

First, you should understand that elastic audio (whether tick-based or sample-based) uses the same basic TCE processes as a time compression/expansion plugin. Most of these will create subtle artifacts when processing. However, the Vari-Speed algorithm just speeds up or slows down the recording (resamples it at a different rate) and will not degrade audio quality - similar to speeding up a 24 fps film to transfer to PAL.

Tick-based Elastic Audio is not what you want here, but you can use sample-based Elastic Audio for this with the tracks set to use Vari-Speed. Using Elastic Audio will be a little easier than using a Vari-Speed / Resampler Audiosuite plugin on its own, because you can tweak, adjust, and preview the playback & alignment before committing the change. You can enter the exact percentage of playback rate change in the Elastic Properties dialog. If you don't know it exactly, you can also go manually align the ends of the audio with the video so that it's playing at the correct rate.

So Elastic Audio will be helpful here, but don't try using tick-based to do this - it'll be too complicated. Sample based tracks will work better.

I hope that helps.
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Paul Vercellotti
Avid Engineering
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