Re: [PD] filters with audio rate cutoff frequency

[Dario Sanfilippo]

For time-variant one-pole LP and HP, I use these coefficients with rpole~:
http://www.earlevel.com/main/2012/12/15/a-one-pole-filter/.

They have a fairly accurate response for basically the whole spectrum.
Below .01Hz or so, you need double precision.

Dario

On Wed, 13 Mar 2019 at 19:13, Alexandre Torres Porres 
wrote:

>
>
> Em qua, 13 de mar de 2019 às 07:30, Peter P. 
> escreveu:
>
>> * Alexandre Torres Porres  [2019-03-12 18:21]:
>> > Em ter, 12 de mar de 2019 às 06:31, Kosmas Giannoutakis <
>> > giannoutakiskos...@hotmail.com> escreveu:
>> >
>> > > Hi, is there any implementation of filters in Pd with audio rate
>> cutoff
>> > > frequency?
>> Forgive me if this has been posted already, but what about [vcf~] which
>> has a lowpass and bandpass output and a signal inlet for cutoff?
>
>
> yup, that and bob~ have been mentioned. I could add other lower level
> options like the raw filters [rpole~]/[rzero~]/etc) and [fexpr~], but that
> requires a deeper knowledge on how to use them. And on that topic, let me
> show off my advanced filters section in my Live electronics Tutorial, which
> presents this knowledge:
> https://github.com/porres/Live-Electronic-Music-Tutorial/tree/v-1.0beta-7/Vol.3(in.progress)/Part.09-Filters%26Reverb/31-Filters(Advanced)
>
> cheers
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Re: [PD] filters with audio rate cutoff frequency

[Alexandre Torres Porres]

Em qua, 13 de mar de 2019 às 07:30, Peter P. 
escreveu:

> * Alexandre Torres Porres  [2019-03-12 18:21]:
> > Em ter, 12 de mar de 2019 às 06:31, Kosmas Giannoutakis <
> > giannoutakiskos...@hotmail.com> escreveu:
> >
> > > Hi, is there any implementation of filters in Pd with audio rate cutoff
> > > frequency?
> Forgive me if this has been posted already, but what about [vcf~] which
> has a lowpass and bandpass output and a signal inlet for cutoff?


yup, that and bob~ have been mentioned. I could add other lower level
options like the raw filters [rpole~]/[rzero~]/etc) and [fexpr~], but that
requires a deeper knowledge on how to use them. And on that topic, let me
show off my advanced filters section in my Live electronics Tutorial, which
presents this knowledge:
https://github.com/porres/Live-Electronic-Music-Tutorial/tree/v-1.0beta-7/Vol.3(in.progress)/Part.09-Filters%26Reverb/31-Filters(Advanced)

cheers
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Re: [PD] filters with audio rate cutoff frequency

[Peter P.]

* Alexandre Torres Porres  [2019-03-12 18:21]:
> Em ter, 12 de mar de 2019 às 06:31, Kosmas Giannoutakis <
> giannoutakiskos...@hotmail.com> escreveu:
> 
> > Hi, is there any implementation of filters in Pd with audio rate cutoff
> > frequency?
Forgive me if this has been posted already, but what about [vcf~] which
has a lowpass and bandpass output and a signal inlet for cutoff?



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Re: [PD] filters with audio rate cutoff frequency

[Alexandre Torres Porres]

Em ter, 12 de mar de 2019 às 14:48, Dario Sanfilippo <
sanfilippo.da...@gmail.com> escreveu:

> the zero-delay feedback design
>

isn't that a feedback loop? :)
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Re: [PD] filters with audio rate cutoff frequency

[Dario Sanfilippo]

According to the author of the book below, the zero-delay feedback design
is particularly good for time-variant applications.

So have a look at the filters here:
https://www.discodsp.net/VAFilterDesign_2.1.0.pdf.

D




On Tue, 12 Mar 2019 at 10:31, Kosmas Giannoutakis <
giannoutakiskos...@hotmail.com> wrote:

> Hi, is there any implementation of filters in Pd with audio rate cutoff
> frequency? The filters in Super Collider provide this and it would be very
> handy to have it also in Pd.
>
> Thanks,
> Kosmas
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Re: [PD] filters with audio rate cutoff frequency

[Alexandre Torres Porres]

Em ter, 12 de mar de 2019 às 06:31, Kosmas Giannoutakis <
giannoutakiskos...@hotmail.com> escreveu:

> Hi, is there any implementation of filters in Pd with audio rate cutoff
> frequency?
>

You mean with vanilla objects? Or are you also looking for externals?

I have a bunch of filters in my "ELSE" library and they all take signal
input. Actuyally, the whole library is strongly oriented towards signal
control, like also impulses as triggers, signal gates, etc... and this is
much like Super Collider was designed as well. I also ported many things
from Super Collider like virtually all their chaotic generators - so if you
wanna check it out, see
https://github.com/porres/pd-else/blob/v1.0-beta17/README.md for a list of
objects, and here for the latest releases:
https://github.com/porres/pd-else/releases (also available in Pd via
"Help"=>"Find Externals".

cheers
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Re: [PD] filters with audio rate cutoff frequency

[Alexandros]

I have packed Mike-Moser Booth's [filtercoeff.mmb~] and [biquad.mmb~]
abstractions into one vanilla abstraction which eliminates the use of
[expr~]. Both [omniFilter_abs~] and [multiFilter_abs~] support eight
filter types: lowpass, highpass, bandpass, allpass, lowshelf, peaknotch,
highshelf, and resonant.


All their inlets take signals.

You can find here here https://github.com/alexdrymonitis/filter_abstractions


On 12/3/19 8:56 π.μ., Kosmas Giannoutakis wrote:
> Hi, is there any implementation of filters in Pd with audio rate
> cutoff frequency? The filters in Super Collider provide this and it
> would be very handy to have it also in Pd.
>
> Thanks,
> Kosmas
>
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Re: [PD] filters with audio rate cutoff frequency

[Christof Ressi]

Hey, in pd vanilla there's vcf~ and bob~. Have a look at iemlib for some more 
;-)

> Gesendet: Dienstag, 12. März 2019 um 09:56 Uhr
> Von: "Kosmas Giannoutakis" 
> An: "Pd list" 
> Betreff: [PD] filters with audio rate cutoff frequency
>
> Hi, is there any implementation of filters in Pd with audio rate cutoff 
> frequency? The filters in Super Collider provide this and it would be very 
> handy to have it also in Pd.
> 
> Thanks,
> Kosmas
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