- Chuckk Hubbard badmuthahubbard@gmail.com [2007-11-24 09:28]:
On Nov 23, 2007 9:54 PM, cyrille henry cyrille.henry@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
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