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Design of a Digital Biquadratic Peaking or Notch Filter for Digital Audio Equalization

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Digital audio processing requirements often call for one or more second-order notch or peaking filters with prescribed center frequency, width, and center-frequency gain. A very simple set of design relationships is presented, with its development and significance, showing that coefficient values can be obtained immediately.

JAES Volume 34 Issue 6 pp. 479-483; June 1986
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AES - Audio Engineering Society