Doepfer A-111-4 Quad Precision VCO

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 - Frequency Modulation (FM) or Pulsewidth Modulation of the rectangle (PWM) - Modulation intensity - Triangle output - Sawtooth output - Rectangle output (about 50% without external PWM) - Sync input (hard or soft sync internally selectable via jumper, CEM3340 hard sync type) - min. 10 octaves range (with appropriate external CV) CEM3340 based VCO (triangle core)