DOEPFER A-111-4 QUAD PRECISION VCO

A-111-4 contains four precision VCOs and has individual controls, inputs and outputs for each VCO available as well as a common control and output unit. After all the A-111-4 is very similar to four A-111-3 without LFO mode but built in output mixers for the three waveforms, and a master unit for all four VCOs.   Controls, inputs and outputs for each of the four VCOs: 1V/Octave CV input Octave switch (+1 / 0 / -1 octave) Tune control (range internally adjustable by jumpers: ~ 2 semitones / ~ 1 octave / ~ 4 octaves)   Modulation CV input Modulation destination: upper position: exponential frequency modulation (XM) lower position: linear  frequency modulation (LM) or pulsewidth modulation of the rectangle (PM), selectable via internal jumper  Frequency Modulation (FM) or Pulsewidth Modulation of the rectangle (PWM) Modulation intensity Triangle output Sawtooth output Rectangle output (about 50% without exte