A bandpass filter, as used in auditory modeling; approximates the frequency selectivity of a haircell site on the basilar membrane in the cochlea.
coded following: V Hohmann Frequency analysis and synthesis using a Gammatone filterbank Acta Acustica vol 88 (2002): 433--442
input sound to filter.
Centre frequency. Default value is 440.0. Cannot be modulated.
Bandwidth of filter. Default value is 200.0. Cannot be modulated.