Not less than four frequency controls make tuning an ease:
- Switch for LFO or VCO range
- Octave rotary switch with six positions
- Fine tuning control (approximately one octave range)
- Coarse tune control (approximately one semitone range)
The oscillator has a frequency range of at least 15 octaves (0.0001 - 40 Hz in LFO mode, 0.5 - 20 kHz in VCO mode) and has perfect Volt per octave tracking over at least ten osctaves, typically in the range of 20 Hz to 20 kHz. Frequencies below 25 Hz are visualized with a two-color LED.
An 1V/octave input without attenuator is expanded by two scaleable FM inputs, one for linear and one for exponential frequency modulation. Using a jumper you can decide whether the module obtains pitch CV via the internal bus.
The VCO has a triangle core from which sawtooth, pulse and sine are derived. The waveforms are almost perfect and sans glitches.
The pulse width can be set with a control from 0 to 100% and of couse it can be modulated.
The A-111-2 features not only one but two inputs for oscillator synchronisation - one for hard and one for soft sync, which both differ in sound with the hard sync being more aggressive and richer in harmonics.
1V/octave input, exponential FM input, linear FM input
PWM CV input, soft sync input, hard sync input
Waveform outputs: saw, pulse, triangle, sine
3U Eurorack module, 14 HP wide, 55 mm deep
Current draw: 70 mA at +12 V and 50 mA at -12 V