Doepfer A-177 User Manual

doepfer
A-177
Ext. Foot Controller
Scale
CV 1
Foot
Ctr. 1
Scale
CV 2
Foot
Ctr. 2
System A - 100
1. Introduction
Module A-177 (External Foot Controller) gives you the option of integrating double foot switch into the System A-100.
That gives you the ability to use
control voltages, and foot-switches to send gate signals, in real time - very useful in the creative
sound-making process.
The foot pedal inputs have scale control knobs, for manual adjustment of the voltage scale they put out.
Trim pots are available to provide an offset
particular foot pedals you use (if for instance they don’t otherwise go exactly to zero at the minimum point of their travel).
External Foot Controller
two foot pedals
pedals
A-177
and
one
to send
for the
Gate 1
Gate 2
Double
Foot
Switch
1
A-177
External Foot Controller
System A - 100
doepfer
2. Overview


A-177
EXT. FOOT CONTROLLER
CV 1
CV 2
Gate 1
Gate 2
0
0
EFC
Scale
10
Foot Ctr. 1
Scale
10
Foot Ctr. 1
Double
Foot
Switch
Controls:
Scale : voltage range control for pedal 1
1
2 Scale : voltage range control for pedal 2
3, 4
5, 6 LEDs : LED indicators to show the gate
: LED indicators to show the voltage
LEDs
being sent by pedals 1 and 2
signal being sent by switches 1 and 2
In / Outputs:
CV 1 : CV outputs for pedal 1 (internally
!, "
linked)
Foot Ctr. 1
§
CV 2 : CV output for pedal 2
$
Foot Ctr. 2
%
& Gate 1 : gate output for foot-switch 1
Gate 2
/
D. Foot Sw.
(
: input socket for pedal 1
: input socket for pedal 2
: gate output for foot-switch 2
: input for double foot-switch
2
doepfer
System A - 100
3. Controls
1 Scale • 2 Scale
Controls 1 and 2 are used to set the overall range of the control voltages ( CV 1 or CV 2) put out by footpedals 1 or 2.
External Foot Controller
A-177
5 LED • 6 LED
LEDs 5 and 6 give a visual indication of the gate signals Gate 1 and/or Gate 2 put out by a double foot
switch.
H
Doepfer
ally suited to the System A-100, but other makes can be used. If you do use other designs, it may happen that the control vol­tage won’t go all the way down to zero.
nal trim pot to adjust the offset until the pedal does go to zero. You just need to use a miniature screwdriver to adjust the screw in the small blue square trim pots on the A­177’s circuit board.
’s own design of footpedal is ide-
In this case, you can use an inter-
3 LED • 4 LED
LEDs 3 and 4 give a visual indication of the control voltages
and/or 2.
CV 1 and/or CV 2 put out by foot pedals 1
4. In / Outputs
! CV 1 • " CV 1
CV outputs
voltage CV 1 put out by foot pedal 1. LED 3 shows the level of the voltage. The sockets are internally connec­ted ("a mini-multiple").
§ Foot Ctr. 1 • % Foot Ctr. 2
Connect a foot pedal to either or both input sockets and %. The connection system for the 6.3 mm stereo jack plug adopted by Doepfer is shown in fig. 1.
H Unfortunately, not all manufacturers follow the
! and " are the sockets for the control
same system. only ones we can guarantee will definitely work.
Doepfer
foot pedals are the
§
3
A-177
External Foot Controller
System A - 100
doepfer
potentiometer
slider
potentiometer
maximum position
fig.
: foot pedal connection diagram
1
potentiometer
minimum position
$ CV 2
CV output $
2 put out by foot pedal 2. LED 4 shows the level of the voltage.
is the socket for the control voltage CV
& Gate 1 • / Gate 2
Gate outputs & and / are the sockets for the gate signals put out by the double foot switch. LEDs 5 and
give a visual indication of whether each of the
6
switches is active.
( Double Foot Switch
Socket ( is the input for a double footswitch. It is designed to take a stereo 6.5mm jack plug. The connection diagram is shown in fig. 2.
GND
switch 1
switch 2
fig. 2: connection diagram for the double footswitch
H The chosen footswitch must be one that
breaks rather than makes the connection.
Doepfer
The criterion, and also uses the connections shown in fig. 2. If you use a foot switch which makes rather then breaks the connection, it will be neces­sary to patch in an A-165 Trigger Modifier module, to invert the signal.
footswitch design fits that
4
doepfer
System A - 100
External Foot Controller
A-177
5. User examples
Typical foot pedal uses
You can connect a foot pedal or two up to the A-177 whenever you want to use a real-time variable control voltage in your creation of sounds.
Classic uses are, for instance, to control loudness with a VCA, or timbre with a VCF, or to vary the intensity of a modulation, etc..
Patching in a foot pedal via the A-177 is particularly useful if you’re using an A-190 MIDI interface (which has just one pitch CV and one other controller CV).
Typical foot switch uses
You can connect footswitches up to the A-177 whene­ver you want to trigger certain events in real time.
Typical uses might be to connect to the Start / Stop / Reset sockets of sequencer modules (A-155, A­160/1), or the Reset socket on the A-145 LFO; to re-trigger an ADSR (A-140, A-141), to trigger percus­sive sounds using an ADSR, and to switch between
different voltage levels (see fig. 3) or signal sources by means of voltage-controlled switches (the A-150 and/ or A-151).
CV 1
CV 2
Gate 1
A-150
CV
I/O 1
I/O 2
O/I
A-132
VCO
VCF
CV 1 :
CV 2 :
A-177
A-176
LFO
fig. 3: switching between two levels of filter modula-
tion intensity with a foot switch
5
A-177
External Foot Controller
System A - 100
6. Patch-Sheet
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.
A-177
EXT. FOOT CONTROLLER
CV 1
CV 2
EFC
Scale
10
0
Foot Ctr. 1
Scale
A-177
EXT. FOOT CONTROLLER
CV 1
CV 2
EFC
Scale
10
0
Foot Ctr. 1
Scale
doepfer
A-177
EXT. FOOT CONTROLLER
CV 1
CV 2
EFC
Scale
10
0
Foot Ctr. 1
Scale
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.
6
Gate 1
Gate 2
10
0
Foot Ctr. 1
Double
Foot
Switch
Gate 1
Gate 2
10
0
Foot Ctr. 1
Double
Foot
Switch
Gate 1
Gate 2
10
0
Foot Ctr. 1
Double
Foot
Switch
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