Doepfer A-100(~ 40 MB) - Manual (Page 308)

A-127 Triple VC Resonance Filter System A - 100 doepfer
12
Changing how control 1 works
As standard from the factory, Attenuator 1 doesn’t
have any effect on the Original control 8, so that it’s
possible to adjust 1 and 8 independently.
Versions 1 and 2 of the A-127 module:
To change this, you can alter the position of Jumper
J3 on the Mix circuit-board from "Pre" (the factory
default) to "Post" (see fig. 8). In this case, control 1
comes before the Original signal level control 8, and
so does affect both the filter and Original signals.
Version 3 of the A-127 module:
Change the position of Jumper JP4 on the mix circuit
board. JP4 is located right beside the Audio In Level
control.
Even a toggle switch can be added to switch between
pre and post setting of control ol 1.
fig. 8: A-127 mix circuit-board
(versions 1 and 2)