[PD] creating 1/f function in pd?
Charles Z Henry
czhenry at gmail.com
Fri Dec 6 19:59:05 CET 2013
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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