[PD] Formant filter ?

[Alexandre Torres Porres]

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>
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> 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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