just chipping in with my 2 cents that it would be fantastic to get more documented info on all this.
especially curious about: "but they can be combined to make other possibilities." what sort of possibilities??? On Thu, Jul 24, 2014 at 5:07 PM, Alexandre Torres Porres <por...@gmail.com> wrote: > 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 <m...@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 <m...@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 >> > > >> > > > _______________________________________________ >> > > > pd-l...@iem.at mailing list >> > > > UNSUBSCRIBE and account-management -> >> > > http://lists.puredata.info/listinfo/pd-list >> > > >> > > >> > > > _______________________________________________ > Pd-list@lists.iem.at mailing list > UNSUBSCRIBE and account-management -> > http://lists.puredata.info/listinfo/pd-list > >
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