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 ___________________________________ * phae.fr <http://phae.fr>* 17 places des Halles - Ingrandes 49123 Ingrandes Le Fresne s/ Loire phae.il...@gmail.com / +33 (0) 6 04 45 79 78 ___________
_______________________________________________ Pd-list@lists.iem.at mailing list UNSUBSCRIBE and account-management -> https://lists.puredata.info/listinfo/pd-list
