Doepfer A-198 Trautonium / Ribbon Controller - Manual (Page 9)

doepfer System A - 100 Trautonium / Ribbon Controller A-198
9
determines if all semitones or only tones of the minor/
major scale or notes of a chord are allowed. For details
please refer to the A-156 manual.
The second of the two voltage controlled switches of
the A-150 module defines if the position gate Gate
POS
or the trigger output of the quantizer is fed to the gate
input of the ADSR. Additionally a Trigger Delay A-162
is used to lengten the short trigger signal coming out of
the A-156.
Summary:
• Without quantizer each touch of the position sensor
generates a gate signal Gate
POS
that triggers the
ADSR for filter and loudness.
• In the quantized mode the A-156 generates short
trigger signals (~ 10 ms) at each new quantization.
These short pulses are expanded to the desired
length by means of the Trigger Delay A-162. The
output of the Trigger Delay triggers the ADSR for
filter and loudness.
The patch can be extendend in manifold ways:
• Feeding a keyboard or sequencer pitch control
voltage to the transpose input of the quantizer (see
fig. 4) transposes the sounds played on the A-198.
• Use the pressure voltage CV
PRES
and the pressure
gate Gate
PRES
for additional modulations (e.g. filter
frequency, pulse width modulation, frequency mo-
dulation of VCO or VCF, VCF-ADSR or third ADSR
triggered by Gate
PRES,
, third ADSR may be used to
control modulation depth or frequency of a VCLFO
for modulations).
You may add even additional controllers, e.g.
• Pitch: Position sensor (A-198)
or Theremin (A-178)
• Frequency modulation
(VCO): Pressure sensor (A-198)
• Filter frequency: Light controller (A-179)
or Position sensor (A-198)
or Pressure sensor (A-198)
• Glide on/off: Foot switch (A-177)
• Loudness: Theremin (A-178)
or Foot controller (A-177)