[PD] pd filter with pole and zero

Peter Plessas plessas at mur.at
Sat Nov 24 17:14:09 CET 2007

* Chuckk Hubbard <badmuthahubbard at gmail.com> [2007-11-24 09:28]:
> On Nov 23, 2007 9:54 PM, cyrille henry <cyrille.henry at la-kitchen.fr> 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.
> I like playing with raw filters too.  I don't have any references to
> add to Claude's, and really for me it's more a matter of getting
> through the references I already have.  Miller's book has a very good
> explanation, lots of graphs, lots of explanations for the rotation and
> complex number stuff, but still lots of detail.  I've also used the
> graphing abstractions in H14.all.pass.pd, substituting rpole~ et al to
> see the frequency and phase response as I change the values.
> I also found the [fexpr~] object educational.
> I wonder what more knowledgeable people will say to this: my
> impression has been that, as interesting as filter design is, and
> although it's possible and not terribly difficult to learn to
> understand it well, it is not something that will necessarily become
> intuitive with practice.  That, to design specific filters, it will
> still be a matter of performing series of calculations to know what
> values to use, rather than "sort of knowing" what to put.  Thoughts?

Yes, master the Z-Transform (which is not hard, really). :-)

regards, PP

> -Chuckk
> -- 
> http://www.badmuthahubbard.com
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