[PD] [bp~] really equal to [vcf~]?

Alexandre Torres Porres porres at gmail.com
Sat Apr 12 19:10:19 CEST 2014


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 at 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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