How to explain an analog state variable filter ..

[Martin Naef]

On 13.10.2011 09:57, Marc Nostromo [M-.-n] wrote:
> Pretty funny because I was just thinking about implementing a state
> variable filter this morning. Truth is I'm looking for a generic/not too
> expensive filter whose source code is easy to find (mostly for quick
> tests and benchmarking). And that I wouldn't spend 4 days coding :)
>
> Would that be a good pick ? any other suggestion ?
>
> http://www.musicdsp.org/archive.php?classid=3#142

That's the basic stuff, works smoothly if you understand the limits 
(e.g. stability as you approach Nyquist). Obviously, if you want 
character you need to look elsewhere (e.g. Tony's DSM).

Martin