From: "Tim Stinchcombe <timothy@t...>" <timothy@t...>
Date: Thu Jan 9, 2003 1:05 am
Subject: Re: chaos module

Hi Tim and Ethan,

What the hell are a Chua oscillator and a Duffing oscillator
Can you eat it
I never heard of this before.
Most intriquing, please explain!

Roel.

Tim wrote:
I wondered this about the Dark Star Chaos myself, so when Blacet
announced they had a load of the hard-to-get chips at its core, I
bought one (just the PCB and chip). Haven't built it yet, but from
the schematic and the chip datasheet, the answer is no, the DSC is
not associated with what I would regard as 'chaos', i.e. non-linear
dynamics, Chua's oscillator and the like. However, whether it might
*sound* like a chaotic oscillator remains to be seen (I doubt it
though - I did breadboard a Duffing oscillator a while ago, and
it 'shreiked' rather than 'hissed' noisly!). Basically the DSC is
voltage-controlled digital noise (like A117), with built in env gen,
filter, VCA and oscillator.

When I get the time, one of the things I intend doing is to build a
Chua oscillator, stick a voltage-controlled resistor in it, and see
what comes out (and if it sounds reasonable, then stick a phase
comparator and VCO into the mix to see if it can be made to track a
VCO, PLL style, so that one might be able to play tunes with it...)

Tim