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A Versatile Parametric Filter Using an Imbedded All-Pass Subfilter to Independently Adjust Bandwidth, Center Freqeuncy, and Boost or Cut

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Parametric filters use separate and noninteracting controls to change bandwidth, center frequency, and cut or boost levels of an acoustic signal. These filters are a generalization of graphic equalizer filters which can permit gain adjustment of a channelized filter bank composed of filters with fixed bandwidths and center frequencies. This paper describes and demonstrates the performance of a digital signal processing based realization of a parametric filter.

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AES - Audio Engineering Society