Doepfer A-111-4V Quad Precision VCO Vintage Edition

Doepfer A-111-4 Quad Precision VCO Vintage Edition 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. With modulation, a switch can be used to select between exponential and linear FM. Instead of linear FM, pulse width modulation can also be used via an internal jumper. In addition, a common control unit is available which can be used to control the tuning of all four oscillators simultaneously via an octave switch, a tune control and two CV inputs. The master section also contains sum outputs for all three waveforms.