scream

[Martin Czech]

> Hi !
> 
> I don't know, if i posted this question 4-5 month ago.
> 
> Is there someone who has built a "filter" (well, i call it
> filter but to be really correct it isn't) which simulates
> the screaming of a saxophone or soemthing like that. I 
> don't want to simulate a saxophone, just make a saw wave (or
> something else) scream.
> 
> Perhaps this device can be built up like an analog computer model
> of two coupled pendula. They create, depending on the relation
> between the length of both, chaotic movements.
> 
> It should be voltage controlled. To my knowledge, the chua-oscillator
> is not the adequate solution.
> 
> Any idea ?

This "screaming" is phase transition between two or more
modes. A nonlinear dynamic system is needed.

A state var filter (for example) can do something like this,
if overdriven and with a lot of resonance. The self oscillations
starts to fight with the input signal, this causes "screaming".
The more nonlinear the design , the better.

The WASP filter does this quite nice.

m.c.