[Solved] Time stretching to fill dropout/gap

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Vlar
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2014/01/06 14:35:14 (permalink)

[Solved] Time stretching to fill dropout/gap

I have a project that was recorded years ago in which there are several dropouts, where there must have been dropped buffers or some such that caused the audio to skip forward a fraction of a second. Obviously, the resultant audio will not sync with video shot at the same performance. Has anyone used time stretching to "heal" the gap that would be produced if you were to split the tracks at the point the audio skips forward, and then slide the audio after that point forward to resync? It seems like you could time stretch a small piece of the audio, lengthening the beat right before the gap to fill the gap. Any thoughts on this?
post edited by Anderton - 2014/01/09 01:11:05
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    jonny3d
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    Re: Time stretching to fill dropout/gap 2014/01/06 15:51:19 (permalink)
    cut and paste a similar part if possible (if chorus 1 is screwed maybe use chorus 2) the only other advise is TRY IT
    it is after all non destructive (use a copy and experiment) you bought it ..hop in and drive it around the block  (mileage may vary) also for transparency... always try and cut at a beat point
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    Anderton
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    Re: Time stretching to fill dropout/gap 2014/01/06 15:56:24 (permalink)
    If it's not much of a gap, slip-edit the end while holding Ctrl (there will be a yellow line at the clip edge). This does DSP time-stretching. The resulting fidelity will be preview quality; you need to bounce the clip to use the high-quality, Radius time-stretching algorithms. You set the type of offline pitch transposition in the AudioSnap panel.

    The first 3 books in "The Musician's Guide to Home Recording" series are available from Hal Leonard and http://www.reverb.com. Listen to my music on http://www.YouTube.com/thecraiganderton, and visit http://www.craiganderton.com. Thanks!
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    Vlar
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    Re: Time stretching to fill dropout/gap 2014/01/08 14:59:17 (permalink)
    Thanks! This is exactly what I was looking for.
     
    Anderton
    If it's not much of a gap, slip-edit the end while holding Ctrl (there will be a yellow line at the clip edge). This does DSP time-stretching. The resulting fidelity will be preview quality; you need to bounce the clip to use the high-quality, Radius time-stretching algorithms. You set the type of offline pitch transposition in the AudioSnap panel.




    #4
    Vlar
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    Re: Time stretching to fill dropout/gap 2014/01/08 15:00:44 (permalink)
    One other question: will the higher quality algorithm be applied when exporting audio (to a final mix) or do you have to bounce? I will have to be doing this to all the tracks.
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    brundlefly
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    Re: Time stretching to fill dropout/gap 2014/01/08 15:17:08 (permalink)
    Export will take care of rendering the stretching using an offline algorithm, but it's a good idea to bounce to clip(s) first, and solo it to make sure you get a satisfactory result.

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    Vlar
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    Re: Time stretching to fill dropout/gap 2014/01/08 15:37:18 (permalink)
    Thanks. Great idea.
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    Anderton
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    Re: Time stretching to fill dropout/gap 2014/01/08 19:48:36 (permalink)
    Another fine point: Sometimes I split the clip before something like a decay, and just extend the decay. That leaves the initial transients and such intact, so the stretching is almost undetectable.

    The first 3 books in "The Musician's Guide to Home Recording" series are available from Hal Leonard and http://www.reverb.com. Listen to my music on http://www.YouTube.com/thecraiganderton, and visit http://www.craiganderton.com. Thanks!
    #8
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