Code for generating 1/f^alpha pink noise

Hi,

In a recent project I required a source of 1/f^(5/3) pink noise, but was 
unable to find any code or explanation on how to perform that.  The DSP 
Generation of Pink Noise page[1] contains extensive information on 
generating 1/f pink noise, but has no mention of 1/f^alpha pink noise.

I therefore made my own code for the purpose.  It produces pink noise by 
filtering white noise with an IIR filter described by N. Jeremy Kasdin, 
Proceedings of the IEEE, Vol. 83, No. 5, May 1995, p. 822.  (The 
reference was found in an old thread on this group.)

Because there seemed to be no freely available code to produce 1/f^alpha 
pink noise on the net, I made the Java class available.  The procedure 
is very simple to re-implement in other languages as well.  The code and 
a more thorough analysis of the procedure is available at 
http://www.iki.fi/sampo.niskanen/PinkNoise/


Feedback is welcome.  :)


[1] http://www.firstpr.com.au/dsp/pink-noise/

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