Reading all of this, I don't know why the wheel is try to be reinvented:
http://www.cyndustries.com/modules_synthaconfilter.cfm > 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.
The reason there is no "ALL INPUT" attenuator, is because it would not be
useful for anything AFAIK. You generally use "ALL INPUT" when you are not
using the other 3 filters TTBOMK.
The easiest thing to do would be to ask Cynthia directly about this. Also, she
is willing to sell stuffed boards separately. An excellent value IMO.
If that doesn't suite your fancy, try using a few of Peter G.'s Gizmo boards
with Ken's PCB. The Gizmos will take care of this for you with out all of the
fuss and bother.
Cheers!
Todd
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