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Conforming 24.0 audio to 23.976
I am matching audio a client has provided that is 24.0 from a Pro Tools session, and I have to match it with what’s on a tape running at 23.976. If I change the speed to 99.91% in FCP it matches up perfectly. Is this a good way of doing it? Or should I have our audio dept conform it in pro tools? I just don’t want any quality loss or pitch change or anything funny.
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6 Replies
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Hi Duke,
You may search some posts of Michael Gissing on this subject.
Rafael -
If upmost quality concerns you, get your protools guys to resample the file at video speed. Because the slowdown is minimal there’s no need to worry about pitch shift (it’s there, but it’s virtually undetectable).
I can’t speak to Final Cut’s resolution when doing a 99.91%, I’ll rough cut that way but when I send out an OMF to ProTools their system does a fresh resampling.
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You have to use a program like wave agentto convert the header of your 48k WAV files to 47.952 so FCP gets trips into thinking they are that – then they should play fine when linked tothe 23.98 picture (24 = 48 and 23.98 = 47.952
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Sorry, typing with Wacom pen in hand. the app is Wave Agent.
This is all 2nd option after getting it from you protools guy of course.
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There have been so many posts about FCP getting wav file speeds wrong, so I would get your sound post people to supply an aif file with the .1% slow down applied.
You can use Quicktime to do this as well and as it is a vari speed , there is no quality loss and a .1% pitch change is not detectable.
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Thanks for the feedback guys!
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