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Convention Paper

Integrating Filters for Professional and Consumer Applications

Authors: Heylen, Robert L. M.; Hawksford, Malcolm J.

AES Convention 96 · Paper 3834 · February 1994

Abstract

Integrating filters are used in the digital implementation of six common types of equalizer. The chosen examples range from a simple two band tone control to more advanced thirty band equalizers and parametric systems. Special emphasis is given to the process of conversion from the input slider data to the hardware filter coefficients and two methods are proposed. The first, the direct method, is the most obvious approach suitable for static precalculated systems. Using matrix algebra and interpolation, inefficiencies can be exploited, leading to the improved method which is suited to dynamic systems requiring a high update rate. The speed of the two methods is compared and a full filter specification for the six equalizers is also included as well as some example frequency plots.

Details

Published in
AES Convention 96
AES Convention
96
Paper number
3834
Publication date
February 6, 1994
Session subject
Digital Signal Processing
Affiliation
Centre for Audio Research and Engineering, Department of Electronic Systems Engineering, University of Essexm, Wivenhoe Park, Colchester, UK (See document for exact affiliation information.)
Type
Convention Paper