Re: [PD] parametric equalizer

2018-04-20 Thread Raphaël Ilias 
Thanks Alex and Dan,
I am very busy now but I'll look into your solutions ASAP.

I am aware of ggee objects for biquad~ coefficient calculations.
Tough I understand the idea to "split the spectra" of a signal with
low-pass, band-pass and high-pass filters...  what is still unclear to me
is : since the outputs of the filters are then mixed together, how to make
sure that overlap correctly so that if the 3 (low, band and high) filters
have 0db gain ([*~1]) the sum of the 3 together will be similar to the
input (flat response), like it does when your mixer's EQ knobs are all
centered...
and what does it really mean when you turn it counter-clockwise, for
example "MID knob" to -6 dB ?
I suppose it isn't a rejection/notch filter ? So it's just a bandpass
filter with amplitude 0.5 / -6 dB and then mixed with the outputs of the
lowpass and highpass filters ?
Probably there is no perfect design, but I wonder what details I should be
aware of.

But I will study the abstractions/objects you mentioned.

++

2018-04-19 20:11 GMT+02:00 Dan Wilcox <danomat...@gmail.com>:

> Check out [e_3bandeq] in rc-patches: https://github.
> com/danomatika/rc-patches
>
> On Apr 19, 2018, at 11:55 AM, pd-list-requ...@lists.iem.at wrote:
>
> From: Raphaël Ilias <phae.il...@gmail.com>
> To: pd-list <pd-list@lists.iem.at>
> Subject: [PD] parametric equalizer
> Message-ID:
> <cadyadn8jh+dsyr54kpbm5p94+zobhkfdgyyokuw5us4w3o6...@mail.gmail.com>
> Content-Type: text/plain; charset="utf-8"
>
> Hello dear pd lovers,
>
> I wonder if someone as implemented a parametric equalizer similar to the
> ones you find on mixer : like three band LOW MID HIGH, with -/+ X dB so
> that when everything is +0 dB, the output is flat and similar to input.
> And eventually with Q/curve/spectral transistion parameters ?
>
> I know this is a very large question and that there might be a lot of
> different implementations, but I wondered if there are "standard"
> solutions.
> Vanilla preferred or stable libraries...
>
> Thanks !
>
> --
> Raphaël Ilias
>
>
> 
> Dan Wilcox
> @danomatika <http://twitter.com/danomatika>
> danomatika.com
> robotcowboy.com
>
>
>
>


-- 
Raphaël Ilias
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Re: [PD] parametric equalizer

2018-04-19 Thread Dan Wilcox 
Check out [e_3bandeq] in rc-patches: https://github.com/danomatika/rc-patches 
<https://github.com/danomatika/rc-patches>

> On Apr 19, 2018, at 11:55 AM, pd-list-requ...@lists.iem.at wrote:
> 
> From: Raphaël Ilias <phae.il...@gmail.com <mailto:phae.il...@gmail.com>>
> To: pd-list <pd-list@lists.iem.at <mailto:pd-list@lists.iem.at>>
> Subject: [PD] parametric equalizer
> Message-ID:
>   <cadyadn8jh+dsyr54kpbm5p94+zobhkfdgyyokuw5us4w3o6...@mail.gmail.com 
> <mailto:cadyadn8jh+dsyr54kpbm5p94+zobhkfdgyyokuw5us4w3o6...@mail.gmail.com>>
> Content-Type: text/plain; charset="utf-8"
> 
> Hello dear pd lovers,
> 
> I wonder if someone as implemented a parametric equalizer similar to the
> ones you find on mixer : like three band LOW MID HIGH, with -/+ X dB so
> that when everything is +0 dB, the output is flat and similar to input.
> And eventually with Q/curve/spectral transistion parameters ?
> 
> I know this is a very large question and that there might be a lot of
> different implementations, but I wondered if there are "standard" solutions.
> Vanilla preferred or stable libraries...
> 
> Thanks !
> 
> -- 
> Raphaël Ilias


Dan Wilcox
@danomatika <http://twitter.com/danomatika>
danomatika.com <http://danomatika.com/>
robotcowboy.com <http://robotcowboy.com/>



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Re: [PD] parametric equalizer

2018-04-19 Thread Alexandre Torres Porres 
Not a ready made multi band equalizer, but the 'else' library also has a
biquad coefficient generator, which offers more options than the ggee
library (see else/bicoeff). Else also has ready made filters that don't
require biquad~ and take audio signals to control all the parameters (ie.
[else/eq~], [else/lowshelf~], [else/highshelf~], etc).

I thought about making a ready made parametric in else, but you can easily
build it  your own. For the lowest and highest band you need to use
lowshelf and highshelf respectively. Then use "eq~" for the mid bands.

cheers

2018-04-19 7:01 GMT-03:00 Christof Ressi <christof.re...@gmx.at>:

> have a look at the "ggee" library!
> there are a couple of objects which mimik the usual EQ filters and output
> coefficients for [biquad~].
> besides [lowpass], [lowshelf], [highpass], [highshelf], [bandpass] and
> [notch] there's also a [equalizer] object which is a typical peeking filter
> with settable center frequency, bandwith and gain.
>
>
> Gesendet: Donnerstag, 19. April 2018 um 11:45 Uhr
> Von: "Raphaël Ilias" <phae.il...@gmail.com>
> An: pd-list <pd-list@lists.iem.at>
> Betreff: [PD] parametric equalizer
>
> Hello dear pd lovers,
>  I wonder if someone as implemented a parametric equalizer similar to the
> ones you find on mixer : like three band LOW MID HIGH, with -/+ X dB so
> that when everything is +0 dB, the output is flat and similar to input.And
> eventually with Q/curve/spectral transistion parameters ?
>  I know this is a very large question and that there might be a lot of
> different implementations, but I wondered if there are "standard"
> solutions.Vanilla preferred or stable libraries...
>
>
> Thanks !
> --
>
> Raphaël Ilias
>   ___
>  phae.fr[http://phae.fr] 17 places des Halles - Ingrandes
>  49123 Ingrandes Le Fresne s/ Loire
>  phae.il...@gmail.com[mailto:phae.il...@gmail.com] / +33 (0) 6 04 45
> 79 78
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Re: [PD] parametric equalizer

2018-04-19 Thread Christof Ressi 
have a look at the "ggee" library! 
there are a couple of objects which mimik the usual EQ filters and output 
coefficients for [biquad~].
besides [lowpass], [lowshelf], [highpass], [highshelf], [bandpass] and [notch] 
there's also a [equalizer] object which is a typical peeking filter with 
settable center frequency, bandwith and gain.
 

Gesendet: Donnerstag, 19. April 2018 um 11:45 Uhr
Von: "Raphaël Ilias" <phae.il...@gmail.com>
An: pd-list <pd-list@lists.iem.at>
Betreff: [PD] parametric equalizer

Hello dear pd lovers,
 I wonder if someone as implemented a parametric equalizer similar to the ones 
you find on mixer : like three band LOW MID HIGH, with -/+ X dB so that when 
everything is +0 dB, the output is flat and similar to input.And eventually 
with Q/curve/spectral transistion parameters ?
 I know this is a very large question and that there might be a lot of 
different implementations, but I wondered if there are "standard" 
solutions.Vanilla preferred or stable libraries...

 
Thanks !
--

Raphaël Ilias
  ___
 phae.fr[http://phae.fr] 17 places des Halles - Ingrandes
 49123 Ingrandes Le Fresne s/ Loire
 phae.il...@gmail.com[mailto:phae.il...@gmail.com] / +33 (0) 6 04 45 79 78
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Re: [PD] parametric equalizer

2018-04-19 Thread cyrille henry 

hello,

It's not parametric, but I made a vanilla 30 band graphic stereo equalizer. It 
is in nusmuk audio.
I don't know about the deken avaibility, but it's on pd svn and on my website.

cheers
Cyrille


Le 19/04/2018 à 11:45, Raphaël Ilias a écrit :

Hello dear pd lovers,

I wonder if someone as implemented a parametric equalizer similar to the ones 
you find on mixer : like three band LOW MID HIGH, with -/+ X dB so that when 
everything is +0 dB, the output is flat and similar to input.
And eventually with Q/curve/spectral transistion parameters ?

I know this is a very large question and that there might be a lot of different 
implementations, but I wondered if there are "standard" solutions.
Vanilla preferred or stable libraries...

Thanks !

--
Raphaël Ilias
   ___
*phae.fr *
  17 places des Halles - Ingrandes
  49123 Ingrandes Le Fresne s/ Loire
phae.il...@gmail.com  / +33 (0) 6 04 45 79 78
   ___


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[PD] parametric equalizer

2018-04-19 Thread Raphaël Ilias 
Hello dear pd lovers,

I wonder if someone as implemented a parametric equalizer similar to the
ones you find on mixer : like three band LOW MID HIGH, with -/+ X dB so
that when everything is +0 dB, the output is flat and similar to input.
And eventually with Q/curve/spectral transistion parameters ?

I know this is a very large question and that there might be a lot of
different implementations, but I wondered if there are "standard" solutions.
Vanilla preferred or stable libraries...

Thanks !

-- 
Raphaël Ilias
  ___
* phae.fr *
 17 places des Halles - Ingrandes
 49123 Ingrandes Le Fresne s/ Loire
 phae.il...@gmail.com / +33 (0) 6 04 45 79 78
  ___
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