Spectrogram color algorythm

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Newsgroups gmane.comp.audio.sox
Message-ID <[email protected]>
Hello!

I've tried to read source code https://github.com/chirlu/sox/blob/4927023d0978615c74e8a511ce981cf4c29031f1/src/spectrogram.c to understand how point is colored and failed.

Could you please explain how is it gets RGB color from spectrum value? (For any non-monochrome scheme)

Thanks

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