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doepfer System A - 100 Voltage Controlled Panning A-134
1
1. Introduction
Module A-134 (PAN) is designed to provide voltage-
controlled panning for audio signals.
It can equally well pan between inputs (with two in-
puts going to one output) and between outputs - one
input going to two outputs.
As well as the manual mode, panning can also be
voltage-controlled. Two CV inputs (one with an at-
tenuator control are included for that purpose.
Two LEDs give a visual indication of what’s hap-
pening to the signals.
To set the incoming audio signals at the right level,
both Audio Inputs have attenuators.
A-134
VC Panning Module
PanCV 1
Left
Out
CV 2
Audio In 1
CV 2
Lev 1
Lev 2
Audio In 2 Mix
Out
Right
Out
A-134 Voltage Controlled Panning System A - 100 doepfer
2
2. PAN - Overview Controls and indicators:
1 LEDs : status indicators for audio output
2 Pan : manual panning control
3 CV 2 : attenuator for the CV at input "
4 Lev 1 : attenuator for audio signal at input §
5 Lev 2 : attenuator for audio signal at input $
In- / Outputs:
! CV 1 : control voltage input
" CV 2 : ditto, with attenuator §
§ Audio In 1 : input for first audio signal
$ Audio In 2 : input for second audio signal - a swit-
ched socket, so that if nothing is
connected to it, it is automatically lin-
ked to socket §
% Left Output : left audio output
& Mix Output : mix output
/ Right Output: right audio output
A-134
PAN
CV 2
CV 1
Audio In 2
010
Pan
0 10
010
010
VC Panning Module
CV 2
Lev 1
Lev 2
Audio In 1
Left
Output
Mix
Output
Right
Output
doepfer System A - 100 Voltage Controlled Panning A-134
3
3. Basic layout
The A-134 provides both manual and voltage-
controlled panning. It basically contains two matched
linear VCAs like the A-130, and a mixer (see fig. 1).
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 relative amounts of
the two input signals in the mix. The matched
VCAs, with one signal inverted, enable the relative le-
vels of the signals to be controlled automatically.
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 regu-
larly 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.
CV
VCA 1
VCA 2
Mix
Audio
In 1
Audio
In 2
Left
Out
Right
Out
Mix
Out
Inv

Produktspecifikationer

Varumärke: Doepfer
Kategori: Inte kategoriserad
Modell: A-134

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