Based on the classic Electronotes ENS-76 Option 1 circuit, this VCO is a straightforward analog oscillator built around a sawtooth core. It covers a frequency range of 32 Hz to 6.5 kHz, making it well-suited for both bass and mid-range voice work in a modular system.
Pitch control is handled by a coarse and a fine tune knob, giving you precise manual tuning across the full range. Three waveform outputs are available simultaneously: sawtooth, triangle, and square. A linear FM input with its own attenuator allows for frequency modulation with direct control over modulation depth.
Feature overview
Inputs: Pitch CV and Linear FM with attenuator
Circuit: Electronotes ENS-76 Option 1
Core waveform: Sawtooth
Additional outputs: Triangle, Square
Frequency range: 32 Hz – 6.5 kHz
Controls: Coarse tune, Fine tune
Width: 6 HP
Power Consumption: 19mA @ +12V | 18mA @ -12V
Link to files: https://github.com/lucwei/solisynth-main
Difficulty to build: MEDIUM