[sdiy] [SDIY] The most simples Low Pass Filter of the world

[Tim Parkhurst]

On 4/22/06, Diogo Melo <bbdsynth at gmail.com> wrote:
> Hi! i'm trying to modify an old toy keyboard and due to the lack of space
> inside the unit i'de like to assemble a very simple LPF in it.
>
> Any suggestions?
>
>
> Thanks
>
> Diogo
>
Hi Diogo,

I'm assuming you want a voltage-controlled lowpass filter (so that you
can do filter sweeps and 'synth-type' sounds). If so, you might want
to try Ken Stone's version of the Steiner Synthacon filter.

http://www.cgs.synth.net/

Don't forget that you'll need some sort of envelope generator and/or
an LFO if you want to automatically sweep the filter. Another really
simple voltage-controlled filter might be the one used in the old PAiA
2700 series. You might find info about that on the PAiA site, but I'm
not really sure. For most uses, I think you'll find the Ken Stone
Synthacon filter would sound better.


Tim (really simple kind of guy) Servo
--
"Imagination is more important than knowledge." - Albert Einstein