An engineering example of an orthogonal second-order digital all-pass filter impmementation is presented in a fully parametric audio equalizer application. Independent coefficients control frequency, Q, and boost/cut. The noise and scaling properties of the four-multiply normalized ladder structure are analyzed and shown graphically.

Author: Massie, Dana C.
Affiliation: E-mu Systems. Inc., Scotts Valley, CA
JAES Volume 41 Issue 7/8 pp. 564-582; July 1993
Publication Date: July 1, 1993 Import into BibTeX
Permalink: https://www.aes.org/e-lib/browse.cfm?elib=6994

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