How to explain an analog state variable filter ..

[Marc Nostromo [M-.-n]]

Tony's DFM is definetely on my todolist but didn't fit the "And that I
wouldn't spend 4 days coding" criteria  :)

What I'm doing right now is using my framework to mimic (part of) the MS-20
architecture, the idea being that I want to hook the beagleboard on my MS-20
usb controller and map it's midi controls to the innard of the sound graph.

At this point it's only a technological demo/test case/fun/whatever you want
to call it. I'm not trying to impress anyone with the quality of the result.

The funny part is that whenever I will have ported the DFM-1 to my
framework, all I'll have to do is to replace

new SVFilter() ;

to new DFMFilter() ;

:D



2011/10/13 Martin Naef <mnaef at navisto.ch>

> 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<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
>
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