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
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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, about 5 Vpp level (-2.5V ... +2.5V)
- Sawtooth output, about 5 Vpp level (-2.5V ... +2.5V)
- Rectangle output (about 50% without external PWM), about 5 Vpp level (-2.5V ... +2.5V)
- Sync input (hard or soft sync internally selectable via jumper, CEM3340 hard sync type, see technical remarks below)
- min. 10 octaves range (with appropriate external CV)
- CEM3340 based VCO (triangle core)
- each VCO has it's own separate internal +/- power supply for each for best stability and the prevention of unwanted synchronisation of the VCOs
Controls, inputs and outputs of the master section:
- 1V/Octave CV input
- Octave switch (+1 / 0 / -1 octave)
- Tune control (range internally adjustable by jumpers: 2 semitones / 1 octave / 4 octaves)
- Frequency Modulation CV input (FM)
- FM intensity
- Triangle sum output, about 15 Vpp level
- Sawtooth sum output, about 15 Vpp level
- Rectangle sum output, about 15 Vpp level
- as soon as the single waveform output of a VCO is patched this waveform of the VCO in question is removed from the sum (this function can be turned off for each single output socket by means of solder brigdes on the pc board, i.e. the sum contains then all signals independent of the patching of the single output)
- CV output (outputs the sum CV that is used to control all four VCOs)
- bus CV (via jumper, optional, please remove the bus jumper if this feature is not used to avoid unwanted frequency modulation as then the unused CV line of the bus works as a kind of antenna)
Width:18HP
Depth: 40 mm measured from the rear side of the front panel)
Current: +120mA (+12V) / -100mA (-12V)
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