The Doepfer A-111-3 Micro Precision VCO/VCLFO is an analogue VCO/LFO, with a 4HP width, a fully analogue design, a triangle core, and Tune/XM/PW controls. The Doepfer A-111-3 Micro Precision VCO has a wide frequency range, tracking at least ten octaves, along with multiple waveforms, connectivity and oscillator synchronization. It can be easily integrated into a Eurorack Modular system. Its circuit of A-111-3 is similar to the high-end VCOs A-111-2 Doepfer, but with reduced functions and controls.
The A-111-3 has two elements for frequency adjustment - a switch between LFO and VCO mode and a tune-controller whose scope is jumper selectable. The XM-controller can be used as Finetune when nothing is plugged into the XM jack. The VCO has a triangular core, generated from the sawtooth and sine pulse. The waveforms are almost ideal, and without glitches. The pulse width can be adjusted with a knob from 0% to 100% and naturally modulated. For oscillator synchronization there is an input whose type is selected with a jumper from soft to hard sync. The two syncs differ distinguishes it as the hard sync is cutting and biting.
The main features of the Doepfer A-111-3 Micro Precision VCO/VCLFO include: