chaos filter

[Dr. Jörg Schmitz]

I'm thinking about a chaos-filter. 
Imagine a pendulum, which is driven by another pendulum with a fixed 
"input"-frequency. Then the other (driven)
pendulum will behave chaotic (or not), depending on the relation of the
input
frequency and the frequency of the driven pendulum (which is determined
by the length of the axis).
This mechanical arrangement transformed into an analog computer must
be a funny sounding filter if, for example, the length of the driven
pendulum
is controlled by the input frequency (i.e. input CV of the VCO), and the

relation between the input frequency and driven-pendulum-frequency by
another
CV, which is comparable to the filter amount.

Is something like that known, or any suggestions ?

J.S.
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