signal processing - Audio spectrum visualization normalize loudness countour -

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i've written audio spectrum visualizer can see on following screenshot. works pretty peaks not normalized. think caused fact: equal-loudness contour.

does know how balanced peaks (like horizontal line)?

here code: https://github.com/frankred/openframeworks-music-visualization/blob/master/ofapp.cpp

enter image description here

well, if know equal-loudness contour, why not divide it?


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