Subband Decomposition of Audio

Based (somewhat) on the frequency analysis properties of the human ear and auditory system, a common signal processing technique involves splitting sound into separate frequency bands. A common decomposition is based on octaves, successively dividing the spectrum by two. Ten bands are required 

Those of you who have shopped for stereo or recording equipment might remember that graphic equalizers often come in flavors of five-seven bands (car radios), ten bands, and 30 bands (for professional recording). Many 

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