18 Mar
2004
18 Mar
'04
11:11 p.m.
Anyone does know how calculate the parameters of a biquad filter from the center frequencie, bandwith and quality ?
Here are two references that may help: http://aulos.calarts.edu/pipermail/music-dsp/1997-July/019624.html http://www-ccrma.stanford.edu/~jos/filters/BiQuad_Section.html
The first is Robert Bristow-Johnson's BiQuad "cookbook recipes" for the various kinds of filter (such as lowpass, bandpass, highpass, shelving - is this what you mena by "quality"?)
The second is the section of Julius Smith's Digital Filtering text on biquads. The text as a whole is a very informative read.
Jer