Doepfer A-111-4 Quad Precision VCO

Doepfer A-111-4 Quad Precision VCO is a VCO module for modular synthesizers in Eurorack format. The module is excellent for polyphonic synth sounds, but also for dense mono sounds and chords. Each of the four oscillators has its own control section with octave switch, tune control, modulation input with attenuator, sync input and three separate outputs. For modulation, a switch can be used to select between exponential and linear FM. Via an internal jumper, pulse width modulation can be used instead of linear FM. In addition, a common control unit is available with which the tuning of all four oscillators can be influenced simultaneously via an octave switch, a Tune control and two CV inputs. The master section also contains sum outputs for all three waveforms.