you could also use the A119
http://www.doepfer.de/a119.htm

as Monroe says, the VCA won't amplify your external signal

On 15 Aug 2009, at 18:34, Greg Cerveny wrote:

> Hey Sandy,
>
> I tried putting it through an a-131 to bring the level up, do you
> think that would be enough
>
> Curiously, why would an a-120 and an a-106-5 would filter the source
> untreated, but the a-121 need it amplified
>
> Thanks! I'm still new to this and trying to figure it all out.
>
> -Greg
>
> On Sat, Aug 15, 2009 at 11:01 AM, Sandy Brain< sandybrain@... >
> wrote:
> >
> >
> > are you using an external input module of some kind to bring the
> > external input up to 'modular" levels
> > if not, i'd say that's your problem.
> >
> > On 15 Aug 2009, at 17:32, Greg Cerveny wrote:
> >
> >> I'm really confused on this one.
> >>
> >> I have an a121 multimode filter that doesn't filter external
> sources.
> >> At first I thought the filter was not functioning at all. The
> >> resonance will self oscillate and allow hints of what was coming in
> >> from the external source. Then, I patched it in a conventional
> synth
> >> path.
> >>
> >> This works:
> >>
> >> When I patch it in vco -> a121 -> vca, it modifies the sound as
> >> intended (hp/lp/bp/notch).
> >>
> >> These don't:
> >>
> >> When I patch in external source (drum machine/iphone) -> a121, I
> >> barely get anything. The same if I patch ext source -> vca ->
> a121 or
> >> ext source -> vca -> a121 -> vca.
> >> When I have more complex sources like vco -> vca -> bbd (188-2) ->
> >> a121, the result is the same as the external source.
> >>
> >> Conclusion:
> >>
> >> It only seems to filter when I send in simple wave forms from a
> vco.
> >>
> >> Notes:
> >>
> >> My other filters (a120/a106-5), allow me to patch in external
> sources
> >> (iphone/drummachine) and work as expected.
> >>
> >> Is there something unique about the a121 and complex wave forms
> that
> >> I'm missing Is my a121 toast
> >>
> >
> > [Non-text portions of this message have been removed]
> >
> >
>



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