Sample Rate Trimming

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Jim Simon

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Sample Rate Trimming

PostWed Jan 10, 2018 8:58 pm

Is it possible in Resolve 14 to move an audio clip at the sub frame (sample rate) level?

I have a lav recording of a wedding officiant that won't perfectly sync with the camera audio. The different arrival times between lav and camera mic introduce a very minor 'echo'.
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Vit Reiter

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Re: Sample Rate Trimming

PostWed Jan 10, 2018 9:17 pm

Yes, it is.

Trim > Slip Audio > Slip Audio One Subframe Forward/Reverse:
(Option-right arrow and Option-left arrow) Slips the audio/video sync of any clip in 1/10th frame increments.
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Jim Simon

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Re: Sample Rate Trimming

PostThu Jan 11, 2018 8:58 pm

Perfect. Thanks Vit.
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Marc Wielage

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Re: Sample Rate Trimming

PostFri Jan 12, 2018 4:00 am

Jim Simon wrote:I have a lav recording of a wedding officiant that won't perfectly sync with the camera audio. The different arrival times between lav and camera mic introduce a very minor 'echo'.

What we generally do in sound editing and mixing is to never mix two mics like this together at the same time. We make hundreds (more like thousands) of very quick crossfades between tracks, so you never hear more than one audio source up at the same time. Generally, we find a background track or sound-effects ambience track and leave that up to cover any splices and changes in background noise.

You can definitely slip a track a few milliseconds, but be aware that delay will vary depending on distance. The fix you have in one shot may not work for another shot made at a different angle and distance.
marc wielage, csi • VP/color & workflow • chroma | hollywood
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Jim Simon

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Re: Sample Rate Trimming

PostFri Jan 12, 2018 8:54 pm

Thanks, Marc.

In this case, I was mixing the lav with nat sound, both of which picked up the officiant. A couple of sub-frame shifts and the echo is gone.

My wedding prices just aren't high enough for me to make thousands of edits. ;)

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