Re: [Avid-L2] Re: 48000 vs. 48048 and Sound Drift

Here David: http://www.24p.com/AvidInsider2.htm
This should take care of your issues.

cheers
Bogdan Grigoresco
www.finale.tv

--- On Tue, 11/24/09, David Dodson <davidadodson@sbcglobal.net> wrote:

From: David Dodson <davidadodson@sbcglobal.net>
Subject: Re: [Avid-L2] Re: 48000 vs. 48048 and Sound Drift
To: Avid-L2@yahoogroups.com
Date: Tuesday, November 24, 2009, 5:20 PM

 

No, these are digital files. BWAVs. Recorded digitally.

Show is 24fps 35mm. But I've always had sound recorded at 48048 for a 23.976 Avid film project. It has always worked. But a location set mixer recorded at 48000 and it's his stuff that is drifting.

Does this make technical sense?

Thanks,

David

David Dodson

davidadodson@ sbcglobal. net

818-541-1225

818-523-0905 mobile

____________ _________ _________ __

From: oliverpetersvidy <oliverpeters@ oliverpeters. com>

To: Avid-L2@yahoogroups .com

Sent: Tue, November 24, 2009 7:03:05 AM

Subject: [Avid-L2] Re: 48000 vs. 48048 and Sound Drift

David,

> David Dodson wrote:

> For the sound specialists out there... if sound was intended to be recorded at

> 40048 but was mistakenly recorded at 48000, could this in any way cause the

> sync to drift over the course of a long take?

Where are you comparing the sync drift? If this is a digital file, then I would say yes, that's the cause of your drift. Sync is sample-based, not TC based.

If this was recorded on a DAT, rather than a digital file, some machines can adjust/correct for this.

24fps = 48048kHz / 23.976 = 48kHz

- Oliver

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