Doepfer A-101-3 Vactrol Modular Phase Filter - Manual (Page 7)

doepfer System A - 100 Modular Vactrol Phaser A-101-3
7
4. Controls
! Audio In / 1 Level
Socket ! is the audio input with the assigned attenuator
1
. Feed the audio signal that has to be provided with the
phaser/filter effect into socket !. Adjust the Level control
1
so that the output signal does not distort - unless you
want to obtain distortion. For normal A-100 levels (e.g.
VCO A-110) distortion appears at about middle position
of control 1. The input was made a bit more sensible
than for other modules to be able to obtain distortion
without an additional module. Distortion might be inter-
esting with certain feedback settings.
Attention: For the right unit the audio input ! Audio In In
7-12 is normalled to stage output 6 of the left unit ! This
simplifies the patching of phasers with more than 6
stages as the output of stage 6 is connected to the audio
input of stage 7 provided that no plug is inserted into
socket Audio In In 7-12. If both units are used as
separate phasers/filters each unit is supplied with it's
own audio signal that is connected to socket ! (Audio In
In 1-6 resp. Audio In In 7-12).
" CV In / 2 CV / 3 Shift
This group of elements is responsible for the phase shift
control. Knob 3 Shift is used to adjust the phase shift
manually. With an external control voltage (e.g. LFO,
Random, ADSR, Theremin, Ribbon controller, foot con-
troller, MIDI-to-CV) applied to socket " CV In the phase
shift can be modulated. Knob 2 CV is used to adjust the
depth of the CV modulation.
Attention: For the right unit the socket " CV In 7-12 is
normalled to socket " CV In 1-6. This simplifies patches
with identical CVs for both units (e.g. phasers with more
than 6 stages) as the phase shift controls of both units
are supplied with the same control voltage (applied to
socket " CV In 1-6) provided that no plug is inserted
into socket socket " CV In 7-12. If both units are
operated separately even separate CVs are applied to
the CV input sockets.
The voltage difference required at socket " to take
advantage of the full phase shift range is about 5V (with
attenuator 2 fully clockwise).
4 Mix / § Shifted Audio In / $ Mixed Audio Out
Knob 4 Mix is used to adjust the ratio between the
original audio signal (i.e. the signal applied to socket !)
and the signal at socket § Shifted Audio In. Socket $
Mixed Audio Out is the mixer output and normally the
audio output of the phaser.
Socket § is normalled to stage output 6. Provided that
no plug is inserted into socket § one obtains a 6 stage
phaser at output $ Mixed Audio Out. If another stage
output is connected to socket § phasers with 2 - 12