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Normalizing calls in AviSoft

Subject: Normalizing calls in AviSoft
From: "alizaleroux" alizaleroux
Date: Sun Jan 10, 2010 2:02 pm ((PST))
I have a technical question which I suspect has a straightforward answer that I 
have somehow just not grasped...

Does anyone know of a way to batch process a number of vocalizations (some very 
loud, some very soft) so that their maximum amplitudes are all the same, using 
AviSoft software? 

I have several 100 vocalizations that I want to analyze in AviSoft. As these 
recordings were done under natural conditions -- I had varying distances 
between the calling monkey and my microphone -- my spectrograms all have 
different amplitudes.

I want to normalize all these spectrograms to have identical maximum 
amplitudes. There is a "normalize" function under the Edit/Volume menu but I 
can't seem to find the way to get all the different spectrograms to have the 
same amplitude maxima. If I specify a certain % in the Normalize tab the 
different calls still turn out to have very different maximum amplitudes.

I can adjust the individual spectrograms' amplitudes to a specific value by 
multiplying/ dividing it with a different value for each spectrogram but this 
forces me to determine that value for each call individually, and apply the 
math to each spectrogram individually. I'm certain there has to be an easier 

Thanks so much for your help!


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