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dBu level vs. whatever FCP 7 shows
I need to delivery a project with the following audio limits:
Dialogue between +2dBu and +6dBu
M&E peaking no more than +8dBuWhat are the equivalents in the audio meter that FCP 7 shows? Are those measured in VU? If so, what is the equivalent to 2, 6, and 8dBu, respectively?
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6 Replies
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VU metering can be ‘converted’ to dbfs (digital scale used by NLEs and DAWs). 0dbu is usually quoted as -20dbfs. So +8dbu is -12dbfs.
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To understand, VU and dbfs are interchangeable terms (for my purposes)?
Is it always a direct correlation? So then +2dbu would be -18dbfs and +6 would be -14dbfs?
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There isn’t an equivalent between the metering in FCP and VU.
The internal metering in FCP is instantaneous, so it’s not too far different to a PPM (it’s not the same though) but it’s quite different to a VU meter, which averages out the instantaneous peaks.
I use a software meter via Audio Hijack Pro, so it sits outside of the editing software (effectively looking at the output of the edit system) and I just arrange my screen layout to see it.
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Do you use Audio Hijack Pro as your meter, or have that send the audio signal to another program? If so, I’d be interested in hearing what software you use for that.
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Audio Hijack Pro doesn’t have a suitable meter within it for my purposes, I have PPMulator installed as a plug-in within Audio Hijack Pro, because PPM and EBU R128 loudness metering are what I need, VU isn’t used much where I am.
You can get some metering software that’s standalone, the advantage of using Audio Hijack Pro is that you can use metering software that is normally a plug-in for DAW software (VST or AU) and that gives you much more choice, no point in spending the price of SpectraFoo if PSP Vintagemeter does what you need, IYSWIM.
https://www.rogueamoeba.com/audiohijackpro/
https://www.zplane.de/products/ppmulator
https://mhsecure.com/metric_halo/products/software/spectrafoo.html#tab=1 -
On 1Khz tone yes there is a direct co-relation
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