Syncing Problem

TimTyler wrote on 10/22/2003, 5:14 PM
I'm cutting a 6-camera, 24P (DVX100's) concert video using the VV4 default 24P project settings.

The digital audio supplied by the sound people is consistantly out of sync with the audio captured by the camera mics by 1 frame every minute.

The 24-track audio was recorded on multiple DA78-HR's at 24bit, 48k. It was exported to Digital Performa SD2 files for each track, and then exported to 16bit, 44k AIFF.

The AIFF's were then burned to music CD's and I've been importing those music tracks in VV4.

I just asked the audio people for a WAV file of a completely unprocessed track for testing.

If I resize the audio track to preserve the pitch, I hear small but annoying sound artifacts. I've tried all the settings.

If I resize without preserving the pitch, since it's such a small variation anyway, I cannot hear any artifacts, but I need to run that by the audio people first.

In the mean time, do you have any idea as to why the audio is 1 frame per minute longer than the DV?

Comments

SonyEPM wrote on 10/23/2003, 9:13 AM
Not sure what's happening with the audio coming from the 24 track-lots of variables there. Be aware that the DVX100 doesn't record audio in sync with the video either, no matter what the mode- audio will be 2-3 frames early. Amazing but true.

Anyway, syncing the 24 track's audio to camera audio is still going to be wrong, so watch out for that.

I'd like to hook up with you offline on this (I think you are CDM's client, yes?)- please email me at

MD-sonicepm@sonypictures.com

with phone #.