Chaotic Oscillators (over-blown flutes etc)

[chordman at flash.net]

This reminds me of a TV program I saw on PBS a number 
of years ago.  Bear with me, there is DIY in this.  
The program was about how and why heart attacks occur.  
The researchers used an analog computer to simulate
a bad heart using chaos theory.  Some adjustable 
parameter controlled the simulation of a blocked 
heart muscle blood vessel and they showed with their 
simulation, which worked like an oscillator, that at 
a certain point, this parameter's value caused the 
system to go more and more chaotic.  Eventually the
oscillation broke down completely.

They never showed the circuit, but did 
show the analogue computer and the setup was not much 
more than 4 or 5 opamps (maybe less, it's been years 
and this is all from memory) and a handful of caps 
and resistors.

It seems to me that an analog computer could be used 
to simulate the natural aspects of a reed, flute or 
brass instrument.  Is anyone brave enough to help 
with the math on this?  I find this very intriguing, 
especially since analog computer components by and 
large are rather inexpensive.  I would love to have 
a VCO with a few 'Chaos' knobs.

-- Scott Gravenhorst
-- FatMan Site: http://www.teklab.com/~chordman
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