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Is there an app or script that will output raw text data representing an arbitrary number of bands in the audio spectrum of an input file like a .wav or .mp3 to make the data equivalent of a spectrogram?

Audacity will do it for a stereo file but only one band per channel. I am interested in splitting the data up into multiple audio frequency bands.

Thanks!

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A spectrogram will output one number per chunk for each band. Is that what you want? Or do you want it to output a bandpassed signal in each channel? – endolith Dec 17 '12 at 15:06
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What do you mean by "raw text data?" – Jason R Dec 17 '12 at 16:04

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