ahh, that's one of the patch examples on Doepfer's A-172 page - the one without audio example. If you could share an audio example of that Thanks for replying to my post.

--- In Doepfer_a100@yahoogroups.com , achtung_999 <heinrich.himmelwasser@...> wrote:
>
> I totally agree, the A123 is an indispensable tool in my eurorack system. A
> lot of my patches make use of this filter. Very often in tandem with an A122
> and an A172.. Go figure that one out ;-)
>
>
>
>
> On Tue, May 17, 2011 at 11:58 AM, jakobsweb
> <jakob.paulussen@...>wrote:
>
> >
> >
> > Hi everyone,
> > I've been looking for a 4-pole highpass filter like the A-123 which is not
> > being produced anymore - very unfortunately.
> > On top I found out that no manufacturer of eurorack modules seems to offer
> > them. Very odd!!!
> > I emailed Dieter Doepfer who shares my view on the sonic capability of a
> > 24db high pass and also my surprise at the general lack of demand.
> >
> > Dieter Doepfer mentioned that he considers developing a new 4-pole highpass
> > filter with a different chipset from that of the A-123 (CEM3320) - provided
> > there is enough interest in this forum!
> >
> > So - please forum - I hope you are interested.
> > And should anyone have a spare A-123 ... I'd be greatly interested ;-)
> >
> >
> >
>
>
> [Non-text portions of this message have been removed]
>