[sdiy] poor man's alternative to a CS-80?

[JH.]

> Jurgen Haible did a pretty nice analysis of the VCF. By comparing it and
> normal SVF, the modifications are rather simple to do to a digital SVF.

Thanks for the reference.

However, keep in mind that I have presented an analysis of what I could
extract from Yamaha literature. That's just the basic linear system
behaviour.
In no way would I claim that this covers the actual filter in all aspects.
It does not cover any nonlinearities, for instance. Maybe the actual circuit
is quite linear (what I would guess - but it's just a guess), then it should
be
described by my analysis pretty well. If not, well - then it isn't.
The problem is that I can never know.

When I have information about the _circuit_ (as I had for the SSM2040),
the situation is much better.

JH.