chaos filter

[Martin Czech]

> 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 ?
> 
It is not quite equivalent but "FM-Modulation" of two operators with
mutual feedback goes in this direction (remember Yamaha FM really is
PM), ie. one op shortens or elongates the cycle of the other and vice
versa. This really can get chaotic and you can get (white) noise out
of it. Thank you for your pendulum example, I knew the double chaotic
pendulum, it is fun to watch it, but I didn't realize the connection to
FM until now !

m.c.