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The human auditory (hearing) system can be thought of as consisting of a series of bandpass filters. Interestingly, the spacing of these filters do not strictly follow either a linear frequency scale or a logarithmic musical scale. The Bark Scale is an attempt to determine what the center frequency and bandwidth of those “hearing filters” are (known as critical bands). There are 24 “barks” defined, based on the first 24 critical bands of hearing. Verbos Electronics is releasing a filter module based on 12 (every other bark) of  the Bark Scale tunings.

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