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Recursive Digital Filter Design

The subject of digital filter design is enormous--much larger than we can hope to address in this book. However, a surprisingly large number of applications can be addressed using small filter sections which are easily designed by hand, as discussed in §10.1. This appendix describes some of the ``classic'' methods for IIR filter design based on the bilinear transformation of prototype analog filters, followed by the simple but powerful weighted equation error method for general purpose IIR design. For further information on digital filter design, see the documentation for the Matlab Signal Processing Toolbox and/or [63,65,60,75].

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``Introduction to Digital Filters with Audio Applications'', by Julius O. Smith III, (August 2006 Edition).
Copyright © 2007-02-02 by Julius O. Smith III
Center for Computer Research in Music and Acoustics (CCRMA),   Stanford University
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