[PD] pd filter with pole and zero

[cyrille henry]

hello Roman,

it's a nice filter.


here is a butterworth low pass filter that came with exemple H13.
i just change expr to expr~ to allow an audio control of the cutoff frequency.


cyrille


Roman Haefeli a écrit :
> hi cyrille
> 
> i am glad to hear that someone has similar thoughts. i would love to
> have some filter abstractions based on pd's built-in elementary filters.
> however, my understanding is far too limited to create them myself. 
> 
> i once ported and adapted a peakfilter from millers examples into pdmtl
> abs (are they now part of pd-extended, actually?). it is called 
> 
> [fx.filter.peak.sig~]
> 
> the sig stands for audio frequency inlet and audio q inlet. especially
> modulating the q parameter with a signal is fun. 
> 
> to hear it in action (besides a lot of other modulations):
> http://www.netpd.org/sessions/2007-08-17_nordatlantik.mp3
> 
> roman
> 
> 
> 
> On Fri, 2007-11-23 at 20:54 +0100, cyrille henry wrote:
>> hello,
>>
>> i know there is a lot's of filter externals available for pd, but i'd like to use some using rpole~ / cpole~ etc.
>> my main motiviations are : 
>> 1) i don't like using externals
>> 2) this object allow an audio control of the cutoff frequency
>>
>> as there is not a lot's of exemples, i'd like to know if anyone used this objects to make good filter abstraction.
>> or anyone have references in order to disign filter?
>> (i'm looking for a low pass resonant filter by exemple)
>>
>>
>> thanks
>> Cyrille
>>
>>
>>
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