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
>



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