[PD] algorithms for drawing filter response curves

[Mathieu Bouchard]

>>> On 07.02.2011, at 00:12, Hans-Christoph Steiner wrote:
>>>> 
>>>> 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.

Actually, why don't you push a [sig~ 1] through a [rifft~] and use that as 
a probe with which you will connect to a spectrogram patch ?

(the probe's [rifft~] and the spectrogram's [fft~] have to use the same 
block size.)

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| Mathieu Bouchard ---- tél: +1.514.383.3801 ---- Villeray, Montréal, QC