VCO++ — Through-Zero Analog Oscillator for Eurorack

The VCO++ from Hampshire Electronics is a precision analog voltage-controlled oscillator built around the SSI2130 chip — delivering ultra-stable tracking, true through-zero FM and PM, and beautifully rich analog tone.

Designed for both classic waveforms and deep frequency modulation, the VCO++ is a versatile sound source for any Eurorack system. With dual 4-digit LED displays showing note and frequency, it offers precise visual feedback rarely seen in an analog VCO — perfect for tuning, calibration, and live performance.

VCO++ Manual: Download VCO++ Manual PDF

Key Features

• Based on the SSI2130 VCO IC — known for musical, temperature-stable performance
• Through-Zero FM and PM for complex, evolving tones
• Dual 4-digit 7-segment displays for note and frequency readout
• Five waveform outputs: sine, triangle, saw, square, and mix
• Hard and soft sync inputs for phase-locked or harmonically rich modulation
• External FM and PWM inputs with dedicated level controls
• Mix CV input for dynamic waveform blending
• Octave selector with precise tracking across the full range

Controls & I/O

• Knobs: Octave, T-Z FM, T-Z PM, EX FM, PWM, MIX CV
• Inputs: CV, EX FM, PWM, H-SYNC, S-SYNC, T-Z FM, T-Z PM, MIX CV
• Outputs: Individual waveform outs plus mix out

Specifications

• Format: Eurorack module
• Width:20HP
• Power: ±12V Eurorack standard
• Core: SSI2130 analog VCO
• Displays: Dual 4-digit 7-segment for note and frequency
• Construction: Hand-assembled in England

The VCO++ combines the warmth of true analog synthesis with the precision and control modern Eurorack musicians expect — from subtle detuned stacks to full FM chaos, it’s the heart of any serious modular voice.