[sdiy] simple vcf

[Scott Bernardi]

I used one in my og2
http://home.attbi.com/~sbernardi/elec/og2/og2_cem3389.html. They sound
pretty good, pretty much the same as the other CEM filter chips (like
the CEM3320).

Dave Krooshof wrote:

> I googled a week ago for a filter mentioned here
> and came about a file called "c3389pdf.pdf"
> (do a google on that and, see what it is.)
> it's a VCF with VC resonance, a VCA and a VC panning.
> it only needs a few caps and buffers to run it.
>
> But the question is: is a 3389 any good?
>
> I used to think I liked the steeper filters better.
> But I came to realize I like the 12dB/O filters
> better then the 24dB/O ones.
> Current favourite is the 6 dB/O output of a
> 24 dB/O filter. Nice resonance and not
> completely dead simple sinusoid output.
> But then again: I use LPFs to emphasis harmonics
> rather then taking them away.
>
> --