Yeah. I'm a bit selfish in that I really like [moog~] but I'd also like to see a vanilla version to I could migrate the last of my abstractions away from externals for portability. I have tried the rjlib resonant lop~ objects which use raw filters/biquad but they don't sound as good. I only took 1 DSP course in undergrad *years* ago and my filter math is too rusty to properly understand the filters objects and the [moog~] source code. 


On Mon, Jul 21, 2014 at 1:45 PM, Alexandre Torres Porres <porres@gmail.com> wrote:
for plotting the frequency response though, I depend that it'd be possible to emulate with biquad coefficients...


2014-07-21 14:44 GMT-03:00 Alexandre Torres Porres <porres@gmail.com>:

like in a vanilla patch with raw filters or biquad?

that'd be cool indeed :)


2014-07-19 10:29 GMT-03:00 Dan Wilcox via Pd-list <pd-list@lists.iem.at>:
Can you make a clone of [moog~] while you're at it? :)

On Jul 18, 2014, at 11:58 PM, via Pd-list <pd-list@lists.iem.at> wrote:

From: Alexandre Torres Porres via Pd-list <pd-list@lists.iem.at>
Subject: Re: [PD] [lop~] coefficient calculation
Date: July 18, 2014 at 11:44:47 PM EDT
To: Joe White <white.joe4@gmail.com>
Cc: pd-list <pd-list@iem.at>
Reply-To: Alexandre Torres Porres <porres@gmail.com>


hi all, I've been working on filter patches for my courses and I'm still failing ti get biquad coeficients from the [vcf~] code. Maybe anyone out there could help?

I wanted this to plot the frequency response in realtime... 

the [vcf~] filters aren't in the audio Audio-EQ-Cookbook, and the code looks a bit too complicated

thanks

--------
Dan Wilcox
@danomatika






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Dan Wilcox
danomatika.com
robotcowboy.com