Offline Processing Audio Spectrum to retrieve min e max amplitude of bands

Hi! I’m a searching a way to obtain a min and max amplitude of each spectrum band , before to play a sound. In a few words to process offline the total spectrum of a song without play it. If someone can help me to retrieve a sompl methods to do that , I would be grateful to .

Have you tried with VAMP plugins? the have lot of analysis tools that you can use.

Thanks for the reply! No I didn’t know this plug-in , but by the quick look that I have given, I think that it gives to me, too complex object for my usage.