The SSM2040 was used in the Cat SRM - Series Revision Model and is not the original
design. I'm trying to find out what filter was used in the original Cat. The 1st Cat
sounded very different then the SRM and SRMII.

From Blue Synth -

"The first revision SRM employed a SSM2040 (REV-1 Prophet5) filter chip, but this was
then later replaced with the SSM2044 (Polysix)."

Thanks,

Andrew

--- In Doepfer_a100@yahoogroups.com , pH <ph@c...> wrote:
> On 6/11/05 12:25 PM, "eyesleeandrews" <grand.poohbah@c...> wrote:
>
> > I vote YES.....!!! But then again, I started the thread, so that's goes with
> > out saying.
> >
> > I've been doing a bit of research. I definitely think the original filter
> > would be the best. It
> > is certainly the most unique sound.
>
> It shouldn't be called a CAT filter then. The SSM2040 is one of my favorite
> filters, but it is used in many things. Probably best known for the Prophet
> 5 or Octave Voyetra 8. The never released E-mu Audity used it and later
> E-mu modulars, and the Symetrix Phase filter:
> http://www.modezero.com/phase-filter.htm
>
>
> MOTM has done a wonderful clone of the lowpass part, and my impression is
> that this was a hell of a lot of work and research to get even that part
> right. http://www.synthtech.com/motm440.html
>
> A full clone of the 2040 would be great, but I don't see it happening from
> Doepfer anyway. The amount of R&D to get it right would be too much. This
> chip has so many possiblities/modes.
>
> best,
> phil