[PD] more |vcf~| things

[julien.breval at tremplin-utc.net]

Selon Mathieu Bouchard <matju at sympatico.ca>:

> 
> On Wed, 9 Mar 2005 julien.breval at tremplin-utc.net wrote:
> 
> > some values for vcf~_cutoff=50 Hz:
> > Q=0 -- f=1
> > Q=1 -- f=15
> > Q=2 -- f=20
> > Q=3 -- f=24.5
> > Q=4 -- f=28
> > Q=10 -- f=42
> > Q=20 -- f=60
> > Q=40 -- f=86
> 
> This looks pretty close to f = 13.5 sqrt(Q), what do you think?

yes, it's a good relationnship for this particular cutoff

I admit that some time ago, I used f = sqrt(Q) during a concert (at least, it
was satisfying for the music)

so maybe the right formula could be f = k * sqrt(Q), with k to be defined in
function of the cutoff frequency ... I also have to read the ccrma paper that
gunter told me about


thanks for this 13.5 idea,
-j