Doepfer

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@gmail.com> 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?
>>
>
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>
>