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Journal Article

Techniques for Generating Digital Equalizer Coefficients

Authors: Clark, Rob J.; Ifeachor, Emmanuel C.; Rogers, Glenn M.; Van Eetvelt, Peter W.

Journal of the Audio Engineering Society · Volume 48 · Issue 4 · pp. 281–298 · April 2000

Abstract

Coefficient calculation schemes for discrete-time audio equalizers are examined. Close attention is paid to minimizing filter response distortion and the computational load for on-line calculation. Offset and image distortion correction schemes are developed to improve the matched z response distortion. It is shown that prewarping the peak gain in the matched z results in a relatively affordable increase in computation and improves the response, stability, and noise characteristics of the resulting filters. The effects of the emerging higher sampling rates and their influence on coefficient transforms are also explored.

Details

Publication
Journal of the Audio Engineering Society
Volume
48
Issue
4
Pages
281–298
Publication date
April 6, 2000
Affiliation
School of Electronic, Communication and Electrical Engineering, University of Plymouth, Devon, UK ; 2Allen & Heath, Kernick Industrial Estate, Penryn, Cornwall, UK (See document for exact affiliation information.)
Type
Journal Article