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Syncing 32KHZ and 48KHZ Audio

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Daniel Peters
Syncing 32KHZ and 48KHZ Audio
on Oct 10, 2011 at 7:15:40 pm

I am editing video of a presentation / seminar and I'm having an incredibly hard time matching the audio and video due. Here's what I have:

-Seminar was filmed using a Canon XL2 with audio inadvertently set to 12 bit 32 Khz. I was just using the built-in mic to pickup ambient room noise and audience participation.

- Main audio for the workshop was recorded digitally to a USB flash drive at 16 bit, 48 khz directly from the digital sound board at the event.

The camera audio and video always play fine by itself, but I can never sync it with the audio that was captured on the sound board. Over the course of an hour, stuff slowly gets out of sync. I've tried capturing thing the camera audio at both 32KHZ and 48KHZ, but I can still never get it to sync with the other audio.

Any ideas?

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John Fishback
Re: Syncing 32KHZ and 48KHZ Audio
on Oct 11, 2011 at 8:31:42 pm

Have you tried opening the Canon file in QT Pro and Exporting a 48K 16bit file? You could also try Soundtrack pro.


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Daniel Peters
Re: Syncing 32KHZ and 48KHZ Audio
on Oct 14, 2011 at 4:51:11 pm

No luck converting the 32KHZ to 48KHZ in Soundtrack Pro. However, I was able to to take the 48KHZ audio recorded from the board and downsample it to 32 KHZ. When I did that, everything synced up.

I have 10 more sessions to shoot over the coming weeks and this time I'll be sure to have the camera set up to record in 48 KHZ

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