L-Fusion Dual Analog Triangle VCO 18HP Eurorack module review

video upload by LFusion Electronics

Update: Reworked video demo - Music first, explanation second.

The module is now available on Reverb.

"Introduction to Dual Triangle Core Voltage Controlled Oscillator – Fully analog 18HP Eurorack module, contains 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 and 449 other parts.

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 produces 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, this is very precise as human ear can detect detuning from around 3 to 5 cents.

Module can be ordered on E-Bay:"

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 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."