Hi Miller, still trying to get my head around this. But anyway, one thing I have to note is that the source code of [vcf~] says it is a "two pole filter", not a "one complex pole" filter.

Should that description be changed? If not, why?

thanks

2014-04-12 14:13 GMT-03:00 Miller Puckette <msp@ucsd.edu>:

Yep - vcf~ is essentially a wrapper for cpole~.

cheers
M

On Sat, Apr 12, 2014 at 02:10:19PM -0300, Alexandre Torres Porres wrote:
> that's great to know, thanks!
>
> Let me just see if I get a bit of the theory. Can I get [vcf~] with just
> one [cpole~] object and the right coeficients?
>
> Cheers
>
>
> 2014-04-12 13:36 GMT-03:00 Miller Puckette <msp@ucsd.edu>:
>
> > They're quite different.  bp~ is the cheapest possible bandpass filter
> > (as far as I know).  vcf~ is a one-pole complex filter whose outputs are
> > the real and imaginry parts.  The real part may be used as a resonant
> > bandpass filter and the imaginary as a resonant low-pass filter, but
> > they can be combined to make other possibilities.
> >
> > It's possible to graph their frequency responses using the help patch
> > "H10.measurement.pd' in 3.audio.examples.
> >
> > cheers
> > Miller
> >
> > On Sat, Apr 12, 2014 at 04:28:11AM -0300, Alexandre Torres Porres wrote:
> > > Hi there, who can confirm that both [bp~] and [vcf~] are exactly the
> > really
> > > same thingy? The code looks quite different...
> > >
> > > Moreover, why the two outlets for vcf~? Help doesn't say anything.
> > >
> > > Thanks
> >
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> >

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