[PD] Formant filter ?

[Ingo]

Thanks, Alexandre!

 

This looks very helpful!

 

Ingo

 

From: Alexandre Torres Porres [mailto:porres at 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 <williamahuston at gmail.com <mailto:williamahuston at 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 <ingo at miamiwave.com <mailto:ingo at 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?






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