Difference between 16 bit floating and 32 bit integer audio format?

Question

Difference between 16 bit floating and 32 bit integer audio format?

Hi(Bonjour)!

I captured some DV footage yesterday, and FCE HD 3.5 gave me a warning that audio format of footage does not match my sequence settings.

My camcorder is set to 48Mhz for audio, my easy setings is DV NTSC (and item properties for sequences are 48 Mhz-32 bit integer).

My captured clip return 48 Mhz-16 bit floating point for audio with item properties.

Despite the warning, audio is "in sync" in my master clip (24 minutes long).

I can't find any place where I could set the 16 bit vs 32 bit setings.

How can I manage this issue?

Michel Boissonneault

PowerMac G5 dual 2.3, 4.5 Go, Apple Cinema display HD 23", FX-1, Mac OS X (10.4.6), and iMac G4, Ext HD LaCie d2 triple interface 250 Go, FCE HD, macuser since 1988

Posted on Jul 20, 2006 6:18 AM

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Answer 1

Jul 20, 2006 7:10 AM in response to Michel Boissonneault

Oups...

I Made some errors in topic text:

I mean 16 bit integer, 48Khz, 32 bit floating 48 Khz.

Sorry,

Michel B.

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Answer 2

Tom Wolsky

Level 10

152,919 points

Jul 20, 2006 7:22 AM in response to Michel Boissonneault

Not sure why you're getting the error message, but 32-bit float is the way Final Cut processes internally. Curious about the error, could you explain your capture connections, devices, setup and how you captured. Also curious if this project was created in FCE and in which version.

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Answer 3

Jul 20, 2006 8:05 AM in response to Tom Wolsky

Hi(Bonjour) Tom,

Here's the scenario:

1) Movie shooted with my FX1, in DV native format (no downconversion on capture), audio set to 48 Khz.

2) My camcorder is connected (front firewire port to my G5 (10.4.7, 4.5 meg RAM,Quicktime 7.1, laCie firewire 800 on rear port).

3) Open FCE HD 3.5, start a new project, set easy seting to "DV NTSC".

4) I do a"Capture now" for the whole movie (24 minutes long) without problem (as usual).

5) At the end of capture, I got the warning that there is a difference between audio format from my captured clip, and my sequence setings, and that there is a possibility of "un-syncing problem". I click OK and go on.

6) Despite the warning, all material and sequences are "in sync", no problem at all.

7) When I use item properties in browser, I get:
**for sequences : audio format 48 Khz, 32 bit floating (I know that's the way FCE handles audio for better quality)

**for captured clip: audio format 48 Khz, 16 bit integer (the way that DV device handles audio, as mentionned in user manual).

So it's not realy a problem, but it's the first time that I get this warning, and the first time I capture DV shooted material with FCE 3.5 .

thank you

Michel Boissonneault

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