[sdiy] How does 3320 sound as hipass/bandpass

[Scott Bernardi]

I built a bandpass with a CEM3320, four pole (i.e., 12db/octave slopes). See
http://members.home.net/sbernardi/elec/bandpass.html. It works pretty well,
good for filtering noise, and I've used it as a Wah-Wah with a footpedal to
provide the CV.  Also doubles as a sine oscillator.
There's not that much difference between a 2-pole (6db/octave slopes) and a 4
pole, because you can get the narrow band with high Q.
I haven't had much use for high pass filters either.

TooManySynths wrote:

> Hi All,
>
> My chip based diy modular is coming right along.  I
> abandoned chopping my ARPS <sigh>, chips are pretty
> easy and I have a lot of them :)  Yes this means my
> beat up ody II with five busted sliders is for trade.
>  (everything works, it just has scratches and busted
> sliders, five of em).  If you want it, offer me
> something I'd rather have instead, like modules, or a
> whole lot of bannana jacks.
>
> My VCO's are 3340 based, I have a bunch of those.  I
> also have a lot of CEM/SSM and now Korg dedicated
> LPFs. I have never liked the 3320 as an lpf and since
> I have several other choices that I like better, I'm
> not going to use it as such.  However, the 3320 is not
> a dedicated LPF and I could build other filters with
> it. My question is, have any of you made 3320
> bandpass/hipass filters and how do they sound.  To my
> ears, hipass filters don't seem to be quite as
> critical as low pass filters so this might be a good
> application for my 3320s.
>
> Please don't suggest I build discrete circuits, I just
> don't have the patience right now. (A chip for every
> module, and for every module, a chip)
>
> Thanks
> Daryl
>
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--
Scott Bernardi
sbernardi at home.net