[PD] butterworth filter

IOhannes m zmölnig zmoelnig at iem.at
Thu Oct 26 21:13:54 CEST 2006

Pall Thayer wrote:
> I'm attempting to emulate something in PD that calls for a 4 pole 
> Butterworth low pass filter with a cutoff frequency of 10 Hz. I have 
> very little idea what that is. But I'm wondering if it's possible to 
> construct something that would do the same thing in PD. If so, anyone 
> have any ideas on how to make something like that with PD's existing 
> objects?

either use [biquad~] (and your favourite DSP book ;-)) or the ready-made 
butterworth filters from iemlib.


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