[PD] [lop~] coefficient calculation

[Dan Wilcox]

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


-- 
Dan Wilcox
danomatika.com
robotcowboy.com
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