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Computation of overall analysis signal Spectrum

New Here ,
Aug 23, 2023 Aug 23, 2023

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Hello everyone! I have a more technical question but I hope you can give me the answer to that. 
When I scan an entire signal in order to analyze the overall spectrum of it, Audition computes the Overall spectrum with certain amplitudes that I found being different among other audio analysis softwares by even 10dB offset (of course all comparisone are done with the same analysis window characteristics). 

I suppose that it depends on how the Short-time-Fourier-Transform of the signal is normalized frame by frame before doing the mean over all the frames. 

Does anyone know how this normalization is done and by what value it is done? Thank you so much in advance for any answer!

TOPICS
Audio hardware , FAQ , Playback , User interface or workspaces , Version 3 and earlier

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Community Expert ,
Aug 23, 2023 Aug 23, 2023

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The developers have been very consistent over this for the last nearly three decades - and that is that they will tell you nothing technical about any analysis procedure where there are no settings you can control. So if you look at Amplitude Statistics, you'll find that you can determine the RMS setting window width - but that's all. No formulae for anything - at all.

 

It's no good asking - we tried all that years ago and got precisely nowhere. They'll tell you that this information is proprietary, and that you really don't need to know znything formulaic it to use the software in the way it is intended to be used - and that's it, I'm afraid.

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New Here ,
Aug 24, 2023 Aug 24, 2023

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Thank you for the answer, but:

1 - it's the first time I write in this forum, hence I did not know anything about what you said, so thank you for telling me;

2 - I was asking also to other users who might have found an answer to this and that may be not strictly related to anything that is inside the code of the software.

 

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Community Expert ,
Aug 24, 2023 Aug 24, 2023

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I wouldn't hold your breath...

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