Doepfer A-111-2 High end VCO II
The successor of the A-111 High End oscillator is an utterly
precise analog VCO/LFO with a extremely big frequency range,
immaculate tracking over at least ten octaves and nearly perfect
With linear and exponential FM, pulse width modulation, two
simultaneous types of sync and attenuators on all CV inputs the
module is really well-appointed.
Not less than four frequency controls make tuning an ease:
- switch for LFO or VCO range
- octave rotary switch with six positions
- fine tuning control (approximately one octave range)
- coarse tune control (approximately one semitone range)
The oscillator has a frequency range of at least fifteen octaves
(0.0001 - 40Hz in LFO mode, 0.5Hz - 20kHz in VCO mode) and has
perfect Volt per octave tracking over at least ten osctaves,
typically in the range of 20Hz to 20kHz. Frequencies below 25Hz are
visualized with a two-color LED.
An 1V/octave input without attenuator is expanded by two scaleable
FM inputs, one for linear and one for exponential frequency
modulation. Using a jumper you can decide whether the module
obtains pitch CV via the internal bus.
The VCO has a triangle core from which sawtooth, pulse and sine
are derived. The wave forms are almost perfect and sans
The pulse width can be set with a control from 0 to 100% and of
couse it can be modulated.
The A-111-2 features not only one but two inputs for oscillator
synchronisation - one for hard and one for soft sync, which both
differ in sound with the hard sync being more aggressive and richer
- 70 mA +12V
- 50 mA -12V
- 0 mA 5V