External inputs option – Doepfer Drehbank Midi Control Box (device no longer available) User Manual
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A P P E N D I X
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External Inputs Option
If you have bought a unit with the external inputs option you will find 8 ¼" sockets
at the rear of the unit, which are labelled External Inputs.
The 8 external sockets correspond with 8 of the control knobs on the right hand
side of the unit (15, 16, 31, 32, 47, 48, 63 and 64). See below.
Input socket number
(at rear, left to right)
Controller knob on front
panel
Default settings
1
31
Control Voltage
2
15
Control Voltage
3
47
Control Voltage
4
63
Control Voltage
5
32
Foot controller
6
48
Foot controller
7
16
Foot controller
8
64
Foot controller
Inserting a jack into an external input plug overrides the corresponding control
knob on the front panel of the Drehbank unit. The transmitted control values are
derived from the external control voltage.
The Midi function of the external input then corresponds with the Midi function of
the corresponding control knob.To the Drehbank
it is irrelevant whether the
control value is supplied by the control knob at the front panel or by the external
control voltage (also the 64 control knobs generate internally a control voltage with
a range from 0...+5V).
For the external inputs there are 2 operational modes
•
"real" control voltage inputs ( CV mode)
•
foot controller inputs ( FC mode)
•
Control voltage operation (CV mode)
In this case the external input plug needs to be supplied with a „real“ control
voltage within a range of 0...+5V. An example of this could be the conversion of the
control voltage from an analog modular system (e.g. the Doepfer A 100) into Midi
data. You could use the voltage output from a Theremin module (A-178), a light-to-
CV converter (A-179), sequencer (A-155), S&H (A-148) or any other control
voltage source of the A-100 system to generate the corresponding Midi data using
the external inputs of the Drehbank. You can even generate speech controlled
Midi data with the analysis section of the
Doepfer
Doepfer
Doepfer
Doepfer
Vocoder (A 129/1).
Warning
The voltage supplied to an external input should always stay within a
range from 0...+5V. The Drehbank has built in security circuits which will
protect your unit to a certain extent against minimal fluctuations, however
the unit should never receive voltages above +10V and under -5V
through the external inputs as it could, and probably will damage the unit.