[PD] Resonant filter using cpole~ czero~

Patrice Colet colet.patrice at free.fr
Thu Feb 2 12:50:38 CET 2012

> De: "Ed Kelly" <morph_2016 at yahoo.co.uk>

> Hi all,
> Here is my first attempt at making a resonant lowpass filter using
> cpole~ and czero~ objects. It's the first version I've made which
> actually sounds halfway towards what I want to achieve, which is a
> decent diode-ladder or transistor-ladder filter emulation. I want to
> make this using only vanilla objects, particularly rpole~, cpole~
> etc. so that they can be ultra-portable and signal-controlled. Also,
> http://www.timstinchcombe.co.uk/index.php?pge=poles#diode
> Does anyone else have any ideas, or patches we can share?
> Ed
> Gemnotes-0.1alpha: Live music notation for Pure Data
> http://sharktracks.co.uk/


 using biquad~ gives very nice results for resonant filtering, ggee audio filters show how it sounds. It should be possible to use vanilla's audio math objects only for the biquad mathematical functions instead of an external.

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