There is also this website https://www.easycalculation.com/physics/electromagnetism/biquad-calculator.php where you can calculate coefficients.
El mar., 25 jun. 2019 a las 4:22, Ingo (<i...@miamiwave.com>) escribió: > Thanks, Alexandre! > > > > This looks very helpful! > > > > Ingo > > > > *From:* Alexandre Torres Porres [mailto:por...@gmail.com] > *Sent:* Monday, June 24, 2019 9:41 PM > *To:* William Huston > *Cc:* Ingo; pd-list > *Subject:* Re: [PD] Formant filter ? > > > > I'd rather use a more proper bandpass filter than bp~, which does note > have a nice symmetric response. You could use [biquad~] instead, but the > issue is that you'd need to generate coefficients for it. I provide the > [else/bicoeff] object in else that calculates biquad coefficients and I > just uploaded an update in my tutorial that shows how to do that by hand in > a pd patch, see: > https://github.com/porres/Live-Electronic-Music-Tutorial/blob/master/Tutorial/Vol.2/Part.09-Filters-Reverb-Karplus/31-Filters(Advanced)/2.Filters/4.EQCookbook.%5Bbiplot%5D.pd > > > > Em seg, 24 de jun de 2019 às 12:04, William Huston < > williamahus...@gmail.com> escreveu: > > I have one I built, it's basically 3x bp~ stages in parallel, with each > stage being a double bp~ in series. > > > > Get it here: > > https://github.com/WilliamAHuston/BHPDtoolkit > > > > It's called: > > abstractions/BHFormantx3~.pd > > also > > abstractions/FormantControl.pd > > > > I have a fake resonance built in, basically an osc~ at the cutoff freq of > the filter which you can blend it. > > > > It's not pretty, I built this as a PD novice. But it works well. > > > > (You may want to grep through the patches folder to find some examples > where I use this.) > > > > One use I found for it, which is very cool, is to create a source which is > rich in overtones, saw or square or a gritty granular snippet, send it to > the filter. > > > > Tune the 3 bp~'s to a chord, and use a midi controller to set the root of > the chord, to play melodies *on the filter*. > > > > HTH, > > BH > > > > > > On Mon, Jun 24, 2019, 1:50 AM Ingo <i...@miamiwave.com> wrote: > > OK! I just googled "Formant Table" and got lots of results with the > frequencies of each formant. > I guess by using 3 bandpass filters I should be able to build one as an > abstraction. > > Ingo > > > Can anyone point me to a formant filter external that is working and not > too heavy on the CPU? > > > > > > > _______________________________________________ > Pd-list@lists.iem.at mailing list > UNSUBSCRIBE and account-management -> > https://lists.puredata.info/listinfo/pd-list > > _______________________________________________ > Pd-list@lists.iem.at mailing list > UNSUBSCRIBE and account-management -> > https://lists.puredata.info/listinfo/pd-list > > _______________________________________________ > Pd-list@lists.iem.at mailing list > UNSUBSCRIBE and account-management -> > https://lists.puredata.info/listinfo/pd-list > -- Maximiliano Estudies +49 176 36784771 omslo.com maxiestudies.com
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