Doepfer A-179 Light Controlled CV Source (no longer available) - Manual (Page 4)

A-179 Light Ctr. Volt. Source System A - 100 doepfer
4
4. In / Outputs
! ext. Sensor
If one connects an external sensor 1 (e.g. photo
resistor LDR07) to the normalled jack socket ! the
internal sensor is turned off and the illumination of the
external sensor controls the output voltages.
" Inv. CV Out • § CV Out
CV output " puts out the inverted control voltage, and
output § the normal control voltage.
CV output § generates a decreasing voltage, and
output " an increasing voltage when the illumination
decreases (i.e. by covering the sensor).
$ Gate Out
Socket $ puts out a gate signal whenever the control
voltage at output § is greater than the threshold set
with control 5. This gate signal can be used e.g. as a
noise-gate or as a source of manually-triggered gates
for other modules (see user examples).
5. User examples
Module A-179 is another controller that enables
changing sound parameters in real time like the
Theremin A-178 or Foot Controller A-177.
Varying the illumination can be used for all sorts of
control or modulation. Here are some examples:
• VCO pitch control
• VCA gain
• VCF cut-off frequency
• VCF resonance (with the A-121, 122 or 123)
• VC-LFO frequency
• LFO modulation depth
• Panning (A-134)
• Morphing (A-144 + A-135)
• Time parameters of a VC-ADSR or VC-Decay
• Start/Stop
• Clock speed