Re: [PD] curve fitting help?

Hi Dan,

I had a crack based on Joe's and used this solver with your data to get a close-enough polynomial for expr:

http://www.arachnoid.com/polysolve/

Cheers,

Chris.

On 23/10/14 06:16, Joe White wrote:

Hey Dan,

Does the attached patch do what you want? It's a bit crude but you get the same graph output, I suppose you could always smooth the data if you didn't want it linear as well.

Cheers, Joe

On 22 October 2014 20:22, Jonathan Wilkes via Pd-list <pd-list@lists.iem.at mailto:pd-list@lists.iem.at> wrote:

Why not just draw what you want the curve to be in an array?

-Jonathan


On Wednesday, October 22, 2014 2:04 PM, Dan Wilcox
<danomatika@gmail.com <mailto:danomatika@gmail.com>> wrote:


Howdy all,

I’m *almost* done with my rjlib compatible s_minimoog abstraction
for the rc-patches, but I need help finding the right curve for the
ADSR controls. I used block diagrams and the Minimoog Service Manual
to build the dsp chain. What I have now can give a *reasonably*
accurate rendition of Minimoog patches from sheets found online (ELP
Aquatarkus, for instance). What I did notice in comparing it to the
Arturia Mini V AudioUnit minimoog simulation, is that the knob
curves for frequency are different form what I’ve been able to do,
so some patches aren’t quite *right* yet. 

Basically, I’ve tried a number of different exponential and power
curves but can’t get one that has the long, low slope on the low
end. All of my curves rise too quickly. In any case, this is a curve
fitting problem and this is the data I’m working with. The mapping I
want is 0 - 1 to 20 0 20kHz. And no, I don’t to just stick a log hsl
in there :D

Any help would be appreciated so I can get this out there and start
using it!

posfreq
0.0000
0.12583
0.250362
0.375456
0.500768
0.6251750
0.7506300
0.87512750
1.00025000




--------
Dan Wilcox
@danomatika
danomatika.com
robotcowboy.com






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