[sdiy] SSM2164 state variable filter

[Neil Johnson]

Hi David,

> Simply take some of the BP output directly back to the input summer  
> through
> a fairly large resistor (to give the pendulum a bit of a push, as  
> it were)
> -- essentially, negative damping -- but cancel this out at low  
> resonance by
> decreasing the damping feedback input resistor to the summer  
> accordingly.
> When the resonance gain VCA is cranked down, the damping will  
> disappear, but
> the "push" will remain.

Interesting.... do you have a schematic for this you can post or  
email off-list?

I think I'll need to think about this.  But at the same time I  
strongly suggest breadboarding it up and trying it out for real.

Thanks,
Neil
--
http://www.njohnson.co.uk