[PD] algorithms for drawing filter response curves

[Bernardo Barros]

2011/2/6 Hans-Christoph Steiner <hans at at.or.at>:
>
> I've started to write a GUI for generating biquad coefficients (something
> like Max/MSP's [filtergraph~]).  I've gotten the GUI interaction working
> well, now I'm looking for the algorithms for generating a plot of the
> frequency response of a given set of biquad coefficents?  It'll end up being
> Tcl, but I can easily read C, Csound, Java, Perl, Python, etc.

Hey Hans,

Take a look in the wslib SC Quarks, it is implemented there.