Forums > MaxMSP

Designe new filters.

Jun 22 2013 | 5:35 am

Hy guys…

I was just wondering that is it possible to design new filter responses somehow like this :

– "Draw" the response with filtergraph or zplane
– get the coeffs.
– put the into another filtergraph
– the manipulate them with regular filter controls (Curoff/Res/Gain)

Is it possible somehow?

Jun 22 2013 | 6:41 am

somehow not possible. there is no way to get coefficients for biquad from a custom response curve.

Jun 22 2013 | 7:08 am

You can get the coeffs. from the filtergraph object. If you connecz a zplane to the filtergraph you can esig very extrem curves, and you can get the coeffs.

The only problem is that you can use those coeffs for changing it with regular filer controls. Am I right?

Jun 22 2013 | 7:26 am

Here is a patch about what I think, maybe I wasn’t enough clear.

  1. idea.maxpat
Jun 22 2013 | 11:36 am

what you are doing there will require 3 biquads. if that was your aim, this way it will of course work to design a filter.
yet you are still ending up with a series of filters of the known standard types. :)

how to use a linear knob or fader to control poles and zeros? no idea.

i think to find musically interesting settings you can stick to using multiple filtergraphs … the zplane isnt really giving you access to something useful.

Jun 22 2013 | 11:38 am

I see…
I finished the original wish, just was wondering, that maybe I can improve with a more "technical" way :D

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Forums > MaxMSP