[PD] pd filter with pole and zero

cyrille henry cyrille.henry at la-kitchen.fr
Sat Nov 24 20:26:21 CET 2007

Hello Claude,

this is very nice.

changing resonnance does affect the amplitude, so it's quite hard to use this parameter.
so i think it's possible to make a better one, but i'll use it for now.


Claude Heiland-Allen a écrit :
> cyrille henry wrote:
>> i did not find in any of them a low pass resonant filter but i'll have 
>> to investigate.
> I made a (non-scientific, but sounds ok to my (bad) ears...) resonant 
> low-pass filter, see attached.  two zeros at 1/2 sampling rate, plus two 
> poles (conjugate pair) that can be moved about controlled by audio 
> input.  The gain formula comes from Miller's book, iirc, and I probably 
> misused it, but it seems to work ok.
>> thanks,
>> cyrille
> Thanks,
> Claude
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