Doepfer A-111-2 High End VCO II

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 glitches. 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 in harmonics.

HP : 14