Doepfer A-134 VC User Manual
doepfer
CV 2
A-134
VC Panning Module
CV 2
System A - 100
Voltage Controlled Panning
A-134
1. Introduction
Module A-134 (PAN) is designed to provide voltagecontrolled panning
It can equally well pan between inputs (with two inputs going to one output) and
PanCV 1
input going to two outputs.
As well as the manual mode, panning can also be
voltage-controlled. Two CV inputs (one with an attenuator control are included for that purpose.
for audio signals.
between outputs -
one
Lev 1
Lev 2
Audio In 1
Audio In 2
Left
Out
Mix
Out
Right
Out
Two
pening to the signals.
To set the incoming audio signals at the right level,
both Audio Inputs have
give a visual indication of what’s hap-
LEDs
attenuators
.
1
A-134
Voltage Controlled Panning
System A - 100
doepfer
2. PAN - Overview
A-134
VC Panning Module
CV 1
CV 2
Audio In 1
Audio In 2
Left
Output
Mix
Output
Controls and indicators:
LEDs : status indicators for audio output
PAN
Pan
10
0
CV 2
10
0
Lev 1
10
0
Lev 2
10
0
Right
Output
➀
➁
➂
➃
➄
1
2 Pan : manual panning control
CV 2 : attenuator for the CV at input
3
4 Lev 1 : attenuator for audio signal at input §
Lev 2 : attenuator for audio signal at input
5
"
In- / Outputs:
: control voltage input
CV 1
!
CV 2 : ditto, with attenuator
"
Audio In 1
§
Audio In 2
$
Left Output
%
Mix Output
&
Right Output
/
: input for first audio signal
: input for second audio signal - a swit-
ched socket, so that if nothing is
connected to it, it is automatically linked to socket
: left audio output
: mix output
: right audio output
§
§
$
2
doepfer
System A - 100
Voltage Controlled Panning
A-134
3. Basic layout
The A-134 provides both manual and voltagecontrolled panning. It basically contains two matched
linear VCAs like the A-130, and a mixer (see fig. 1).
CV
Audi o
In 1
Audio
In 2
Fig. 1: basic construction
In input mixing mode, the signals from the two audio
inputs are mixed and sent to Mix Output &. By using
the two pan controls 2 and/or any control voltages
connected, you can control the
the two input signals in the mix. The matched
VCAs, with one signal inverted, enable the relative levels of the signals to be controlled automatically.
Inv
VCA 1
VCA 2
Mix
Right
relative amounts of
Left
Out
Mix
Out
Out
In
output panning mode,
the signal present at audio
input 1 (§) is sent to the left (%) and right (/) audio
outputs at levels determined by the pan control 2 and/
or the control voltage/s input to the module. In this
way, you can control the
position of the signal in the
stereo soundstage.
A typical application is to make a signal move regularly about in the stereo soundstage. To do this, a
slow LFO is connected to CV input ! and/or " on the
A-134.
4. Controls and indicators
1 LEDs
The two LEDs 1 indicate the level of signals going
to outputs %, & and /; how they do this depends on
the mixing / panning mode:
Input mixing mode:
In this mode, the left LED refers to audio input §, and
the right to audio input $. The LEDs show the relative
signal levels from each of the inputs being sent to
Mix output &. Table 1 shows the result of differing
control voltages or positioning of the Pan control.
3
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