Doepfer A-144 User Manual

doepfer
System A - 100
1. Introduction
Morphing Controller
A-144
CV
CV
Out 1
Out 2
Out 3
Out 4
A-144
MC
Man. Morph
Module A-144 is an extension module for the Voltage
Controlled Mixer A-135 Controller that derives from a linear increasing con­trol voltage at the input (0...+5V) four displaced triangle voltages (0 bis +5 V). These voltages are
used as control voltages for the Voltage Controlled Mixer to obtain a fading over (“morphing”) the four A-135 audio inputs with only one control voltage fed into the A-144 CV input.
Morphing nual morphing control and modulated with an exter­nal control voltage (e.g. from LFO, ADSR, Random,
MIDI-to-CV, Theremin, Light-to-CV, analog sequen­cer) with attenuator.
Applications
signals in combination with A-135, e.g. morphing bet­ween the 4 waveform outputs of an VCO (sawtooth/ rectangle/ triangle/ sine) or the multimode filter A-121 (lowpass/ bandpass/ high­pass/ notch) or the 4 filter outputs of the A-105 (6/12/18/24dB) to obtain a led slope.
can be
controlled manually
: voltage controlled morphing of 4 audio
4 filter outputs of the
filter with voltage control-
Morphing
with the ma-
1
A-144
Morphing Controller
System A - 100
doepfer
2. Overview
A-144
MC
Morph Controller
CV In
Out 1
Out 2
Out 3
Out 4
0
0
Man. Morph.
Morph CV
Out 3
Out 4
CV
10
10
Out 1
Out 2
Controls:
CV : Attenuator for the control voltage at
1
input !
2 Man. Morph : Manual morphing control
In- / Outputs:
!
Out 1 : Control voltage output 1 (0...+5 V)
"
§ Out 2 : Control voltage output 2 (0...+5 V)
Out 3 : Control voltage output 3 (0...+5 V)
$
% Out 4 : Control voltage output 4 (0...+5 V)
: Control voltage input
CV In
2
doepfer
V
System A - 100
Morphing Controller
A-144
3. Controls
1 CV
Use attenuator 1 to adjust the level of the control voltage at CV input ! affecting the morphing effect.
2 Man. Morph.
Control 2 adjusts the manual morphing.
The module generates an internal control voltage that is the sum of the voltage generated by the manual control 2 and the external control ! attenuated with the attenator 1. This internal control voltage is fed to the 4 internal control voltage modifiers that generate the 4 morphing control voltages appearing at the out­puts " to $.
Fig. 1 shows the connection between internal control voltage and the 4 output control voltages. The internal voltage is equivalent to the position of control 2 if no external CV is used, or is equivalent to the external control voltage ! if manual control 2 is set to 0 and attenator 1 is turned fully clockwise.
E.g. the control voltage “a” has the following effect:
Out 1 = max. (i.e. +5V) • Out 2 = 0 • Out 3 = 0 • Out 4 = 0.
In case “b” the following output voltages appear:
Out 1 = 0 • Out 2 = 0 • Out 3 = 50 % (i.e. +2.5V) • Out 4 = 50 % (i.e. +2.5V).
CV Out 1
CV Out 2
CV Out 3
CV Out 4
CV In
b
a
+5
0 V
Fig. 1: Connection between internal control voltage
(= sum of manual CV and external, attenua­ted CV) and the resulting output control vol­tages (range of input and output voltages is
0...+5V)
3
A-144
Morphing Controller
System A - 100
4. In- / Outputs
! CV In
The external control voltage is fed into the CV input
.
!
" Out 1 • ... • % Out 4
The 4 output control voltages are available at the CV outputs " to % .
CV
Audi o
Out
doepfer
ext. CV 1
ext. CV 2
ext. CV 3
ext. CV 4
A-135
VC-Mixer
Audio In
Audio Out
1
2
3
4
A-144
MC
CV Out
1
ext. CV
2
3
4
5. User examples
Morphing (standard application)
The patch in fig. 2 shows the typical application of the A-144: the fading over (“morphing”) of 4 audio signals in combination with the voltage controlled mixer mo­dule A-135.
An increasing control voltage (typical range 0 -> +5V) at the CV input of module A-144 results in continuous “morphing” from audio signal 1 via 2 and 3 to 4.
4
CV Out 1
CV Out 2
CV Out 3
CV Out 4
CV In
: Morphing of four audio signals
Fig 2
doepfer
System A - 100
Morphing Controller
A-144
Different control voltage sources lead to interesting morphing effects:
Automatic morphing
(A-145, A-146), VCLFO (A-147), ADSR (A-140), VCADSR (A-141) or analog sequencer (A-155). For manual morphing e.g. these modules can be used: Theremin (A-178), Light controlled CV (A-179), Foot controller (A-177), Joy Stick (A-174), MIDI-to-CV interface (A-190, A-191, e.g. in combination with mo­dulation wheel or after touch).
ca be realized e.g. with LFO
Quadrophonic spatial positioning
In the patch in fig. 3 the A-144 outputs control four VCAs. The audio inputs of the VCAs may be fed with the same of even different audio signals. Each VCA is followed by a separate power amplifier/loudspeaker.
The CV input voltage of the A-144 defines the spatial position of the audio signal in the quadrophonic spcae. Additional modules like CV-Phasers (A-125) or CV frequency shifters (A-126) may be used to intensify the spatial impression.
Audio InCV In
A-144
Out 1
Out 2
Out 3
Out 4
Fig. 3: Positioning of audio signals in the quadro-
VCA 1
VCA 2
Quad Space
VCA 3
VCA 4
phonic hearing space
A sawtooth control voltage is used to obtain a conti­nuous spatial rotation of the audio signal.
5
A-144
Morphing Controller
6. Patch-Sheet
System A - 100
doepfer
The following diagrams of the module can help you recall your own Patches. They’re designed so that a complete 19” rack of modules will fit onto an A4 sheet of paper.
Photocopy this page, and cut out the pictures of this and your other modules. You can then stick them onto another piece of paper, and create a diagram of your own system.
Make multiple copies of your composite diagram, and use them for remembering good patches and set-ups.
P
Draw in patchleads with colored pens.
Draw or write control settings in the little white circles.
A-144
MC
Morph Controller
CV In
Out 1
Out 2
Out 3
Out 4
0
0
Man. M orph.
Morph CV
Out 3
Out 4
CV
10
10
Out 1
Out 2
A-144
MC
Morph Controller
CV In
Out 1
Out 2
Out 3
Out 4
0
0
Man. M orph.
Morph CV
Out 3
Out 4
CV
10
10
Out 1
Out 2
A-144
MC
Morph Controller
CV In
Out 1
Out 2
Out 3
Out 4
0
0
Man. M orph.
Morph CV
Out 3
Out 4
CV
10
10
Out 1
Out 2
6
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