Derive coefficients for a shelving filter with a given amplitude and cutoff frequency. All coefficients are calculated as described in Udo
Zolzer's DAFX book (p. 50 -55).
Usage: [B,A] = shelving(G, Fc, Fs, Q, type);
G is the logrithmic gain (in dB)
FC is the center frequency
Fs is the sampling rate
Q adjusts the slope be replacing the sqrt(2) term
type is a character string defining filter type
Choices are: 'Base_Shelf' or 'Treble_Shelf'
Typically this filter is used for multi-band equalization of audio. For example a 3-band equalizer (Bass/Mid/Treble) might use:
Bass = Bass shelving Filter
Mid = Peaking Filter
Treble = Treble shelving Filter
Jeff Tackett (2022). Bass / Treble Shelving Filter (https://www.mathworks.com/matlabcentral/fileexchange/16568-bass-treble-shelving-filter), MATLAB Central File Exchange. Retrieved .
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