Hexinverter VCNO - Voltage Controlled Noise Oscillator - Demo + Overview

Published on Apr 21, 2017 Hexinverter Électronique

"VCNO is a eurorack modular discrete noise oscillator implemented using an LFSR (Linear Feedback Shift Register) designed with discrete analog parts and logic ICs - no software or microcontrollers.

Availability: shipping May 2017 to modular dealers around the globe!

It is capable of producing full spectrum white noise. But that’s where its similarity to other noise generators stops. VCNO can be used like a VCO – you can modulate the pitch over CV and use its multiple outputs simultaneously, each with a distinct sonic character. Its method of generating noise is similar to that used in early computer sound chips, except it has been implemented here using discrete logic, without the use of software or microcontrollers."

via Hexinverter

"VCNO is a noise oscillator, capable of producing full spectrum white noise. But that’s where its similarity to other noise generators stops. VCNO can be used like a VCO – you can modulate the pitch over CV and use its multiple outputs simultaneously, each with a distinct sonic character. Its method of generating noise is similar to that used in early computer sound chips, except it has been implemented here using discrete logic, without the use of software or microcontrollers.

FEATURES

Discrete Noise Algorithm

LFSR (Linear Feedback Shift Register) algorithm implemented using discrete analog parts and logic ICs - no software or microcontrollers

PITCH generator capable of frequencies up to half a megahertz. This results in a spectrum of noise which reaches far beyond that of human-hearing

NOISE is the main LFSR output. With the pitch knob turned fully clockwise this will output pure white noise. As you turn the pitch down, the noise evolves into crunchy noise, reminiscent of vintage video game sounds

GATE is a DC-coupled output. This is perfect for supplying random triggers in your system


Three Unique Alternative Outputs

Each of the three alternative outputs are completely different circuits – SCREECH, SIZZLE AND TEAR have their own unique sonic characteristics

SCREECH features a dark, howling overtone to the main NOISE output

SIZZLE features a related control, which takes the output from pure white noise when turned fully clockwise to a vinyl-like crackle when turned anti-clockwise

TEAR sounds like the noise generator is broken and tearing itself apart

All outputs work simultaneously, and are simultaneously affected by the pitch knob or CV


PITCH Input

The frequency of VCNO can be modulated via CV – just patch any CV signal into this jack

A bipolar attenuverter lets you find the right level and polarity for your CV signal

A switch on the back lets you select either logarithmic or linear response at the CV input jack


CLOCK Input

Applying a clock signal here bypasses the internal PITCH frequency generator. You can apply a clock from a trigger sequencer to create a pseudorandom drum trigger pattern synced to the rest of your drums"