Modular Synth Panels

ixqy@... wrote:

> Do you mean each of the three existing inputs on the PCB (LP/BP/HP) would
>need an opamp mixer in order to sum the All Pass to each of the three said
>inputs?
>

Yes.

> Is this because a passive mixer would load the inputs? Sorry for the
>technician part of me showing. ;-)
>
>

Basically, yes. The Synthacon VCF inputs presume a single low-impedance
signal coming in. Injecting two signals at any of these inputs really
calls for a proper mixing circuit.

What's the opinion about the All pass feature? I know Cynthia Webster's
version of the Synthacon has it, but there is not a separate attenuator
for the All input.

-Richard Brewster