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32bit floating point is the audio sync problem
Hi,
just thought I post this solution.
We are working on a HD project (1h), ProRes422(HQ) setting, 48kHz. The footage was shot with EX-3.
When we got the sound back from the mix (WAV, 48kHz) is showed up in the finder as correct duration, but once placed into the timeline is shrunk and ended up too short (about 3sec) and hence the sync was lost.
Next step was getting a AIFF bounced out from the Sound Guys, but same problem.
Changing to other sequence settings didn’t help. We tried Sony EX, uncompressed etc. Also looked at all render settings but our system is MacPro with 10GB Ram, so speak isn’t the issue.
I then ended up importing it into Soundtrack Pro and output another AIFF 2ith 32bit floating point – problem solved. No its on duration and in Sync.
Cheers Alex
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3 Replies
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Wow Alex!
I’ve been working on this problem for two months! Yesterday I found that if I could import the mix into AE and change from no compresssion to 32 bit floating that the audio from the protools session would show up (Finally!) in sync. It was a very confusing issue and I talked to a lot – a lot – of people about why the sound files showed up the proper length in quicktime player pro, and after effects but would not show up in my sequence or even on import into the viewer with the proper length. They are about 2.3 seconds short of the show length.
This has been crazy trying to figure this out. Thanks for caring enough to post your results and share it with the community. I’m still anxious about the problem but at least there is some workaround for it.
david
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Happy to have been of help!
Cheers Alex
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hi
i am curious about this possible fix in the context of correcting sync issues when round tripping from fcp to stp and back – i have tried all sorts of things – and this one seems promising – the original sample rates i have in the fcp project are inconsistent, so perhaps roudntripping them to 32 bit would be a corrective? – but i cannot figure out how to select 32 bit floating point in the aiff export from stp?
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