[PD] [vcf~] and [biquad~] filters

[julien.breval at tremplin-utc.net]

Selon Frank Barknecht <fbar at footils.org>:

> Hallo,
> julien.breval at tremplin-utc.net hat gesagt: // julien.breval at tremplin-utc.net
> wrote:
> 
> > The right solution sould be to use [biquad~]. MSP-[biquad~] looks like
> Pd-
> > [biquad~] with some arguments inversed. 
> > Unfortunately, besides a paper from Harmony Central I didn't find much 
> > information on it. Do you know any documentation about biquad filters ?
> 
> Guenther wrote a set of externals to assist in biquad~ filter design.
> See externals/ggee/filters on the CVS at pure-data.sf.net

Thanks, I will have a look at it

actually, all I need is some basic conversion information from (F, Q) to the 
the parameters of [biquad~]