one/F noise source ckt?

[Thomas Hudson]

There have been some good discussions of 1/f
noise on the music dsp list. Unfortunately,
other types of noise made me unsub from that list.
There are some good links in this message:

http://shoko.calarts.edu/~majordom/music-dsp/1998b/msg00119.html

I also have some code lying around based on an
old Marvin Gardner/Scientific American article
for generating 1/f random numbers. 

I've never seen any way to generate it electronically,
which seems strange considering the first link
in the above message would lead me to believe
it is everywhere :-)

Tomy


Paul Perry wrote:
> 
> I'm looking for a source of 1/f (AKA flicker noise)
> noise generator, or something resembling it.
> Thins 1/f noise is so-called, because the amplitude is
> inversely proportional to frequency.
> And, is connected with fractal geometry, in the sense that
> a plot of this noise is self-similar in the same way.
> 
> I want a generator over the usual LFO ranges, .01 Hz to audio say.
> Does anyone know a reliable generator? Or a simple algorithm?
> Or, what I would particularly like, a filtering strategy to
> convert white noise into it? (note that I'd need a white noise source
> that went near as dammit to DC)
> 
> I know a lot of you guys know more maths than i do!
> and, I only need an approximation..
> 
> paul perry melbourne australia