[PD] creating 1/f function in pd?

[Charles Z Henry]

On Fri, Dec 6, 2013 at 12:29 PM, lucrecio diaz <lucrecio.dias at gmail.com>wrote:

> Hi, im new with pd, i working on a project where i need to sonify data
> as a waveform.
>

Welcome to pd, Lucrecio--some questions: what's the data, and what features
of the data are being mapped into sounds?


> Then I need to measure each set of data using a 1/f function .
>

If you're synthesizing the sounds, you should be able to predict the 1/f
characteristic.  What's the meaning of extracting the (1/f) exponent?


> 1/f noise  its a famous distribution found in diverse areas.
> The 1/f function measures the difference in the slope of the line of
> closest fit to the data and the hypothesized 1/f curve of that data.
>

I'm familiar with Stochastic Analysis--Can you share the formulas or  link
to a reference that has them?


> I would like to know if pd is a good option for building this function
> for evaluating data?
>

It's generally good for any type of numerical problem on signals.  Even if
you're unable to create an implementation with existing classes, you can
write your own perform routines in C.


> or maybe theres already a plug in? or library for making this?
>
> where  to start ? any hint?
>

 Some years ago, the pd-list had some posts about (1/f) noise synthesis,
rather than analysis.  Search the archives:
http://lists.puredata.info/pipermail/pd-list/
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