LFusion Dual Analog VCO 16HP Eurorack module demo review - Linear, Exp & Thru-Zero FM, Triangle core

video upload by LFusion Electronics

"Reworked video demo - Music first, explanation second. Introduction to new L-Fusion Electronics Dual Analog Triangle Core Voltage Controlled Oscillator (VCO) compact 16HP Eurorack Synthesizer module with linear, exponential and through-zero FM modulation, sub oscillator and integrated crossfaders. For best sound experience use headphones or studio monitors.

Module can be ordered here:
on Reverband eBay

This fully analog Eurorack Synthesizer module offers two identical VCOs - each oscillator is based on super stable analog SSI2130 VCO IC served by 46 opamps doing precision analog math. In total there are 34 analog ICs (Integrated Circuit chips) and 449 other parts. This video demo was made using two of these modules or 4 VCOs in total spread across 3 voices.

In analog VCO sound wave is generated by charging and discharging precision capacitor controlled by temperature compensated exponential converter, generated triangle wave then goes to wave shapers producing different wave forms. Such technology outputs supreme audio quality.

Pitch is tuned to standard 1 volt per octave, oscillator provides excellent tracking across 10 octaves, it can be tuned with precision of +-1 cent or 0.01 semitone."

via this auction

Dual analog triangle core voltage controlled oscillator (VCO) 16HP Eurorack module with through zero FM modulation based on SSI2130 ICs that provide precision analog exponential converters, oscillator cores, waveshapers as well as high quality voltage controlled amplifiers for wave mixing.

Each VCO in the module outputs sine, triangle, saw and square/pulse waves,also voltage controlled mix of them with sub oscillator an octave below controlled with integrated crossfader mixer.

Both oscillators can be modulated with exponential and linear FM, as well as through zero FM/PM, wave shape and pulse width CV. To ease modulation for each oscillator we have added separate sine outputs with variable gain controlled with modulation knob.

Module also offers master crossfader to mix the outputs of the two oscillators, octave selector switch for each oscillator, as well as knobs for shape, pulse width, pitch and fine tuning. Module is designed using precision voltage reference and other high quality components to achieve +/-1ct (+/-0.01 semitone) tuning across 10 octaves- well below human ear pitch sensitivity which is around 3-5ct.

All inputs and outputs are ruggedized - able to handle rail to rail voltages +12V..-12V.

Power consumption: +12V - 200mA, -12V - 160mA, +5V - 10mA
Module width: 16HP
Module depth: 3.8 cm
Modulation: 1 volt/octave - +5V..-5V or 0..10V
Tuning precision: 10 octaves - +/-1ct (+/-0.01 semitone)
Frequency range: 0.5Hz - 20kHz
Noise level: -90dB
Input impedance: 100kΩ
Output impedance: 1kΩ 0.1%