Peaking / Notch IIR Filter

Generates coefficients for a 2nd order IIR digital filter

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)

[S K]

Does the job! Thnx