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Peaking / Notch IIR Filter

by Jeff Tackett

 

25 Sep 2007 (Updated 26 Sep 2007)

Code covered by BSD License  

Generates coefficients for a 2nd order IIR digital filter

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Description

Derive coefficients for a peaking filter with a given amplitude and bandwidth. All coefficients are calculated as described in Zolzer's
DAFX book (p. 50 - 55). This algorithm assumes a constant Q-term
is used through the equation.

Usage: [B,A] = peaking(G, Fc, Q, Fs);

            G is the logrithmic gain (in dB)
            FC is the center frequency
            Q is Q-term equating to (Fb / Fc)
            Fs is the sampling rate

The typical usages is multi-band equalization where each band has it's own peaking filter.

MATLAB release MATLAB 7.3 (R2006b)
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Comments and Ratings (1)
28 Mar 2008 S K

Does the job! Thnx

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Tag Activity for this File
Tag Applied By Date/Time
audio processing Jeff Tackett 22 Oct 2008 09:28:14
video processing Jeff Tackett 22 Oct 2008 09:28:15
peaking Jeff Tackett 22 Oct 2008 09:28:15
notch Jeff Tackett 22 Oct 2008 09:28:15
iir filter Jeff Tackett 22 Oct 2008 09:28:15
eq Jeff Tackett 22 Oct 2008 09:28:15
equalization Jeff Tackett 22 Oct 2008 09:28:15
audio processing Brent Karley 10 Mar 2009 11:05:44
 

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