Hexinverter VCNO Noise Oscillator Eurorack Module User Manual

Introduction

The Hexinverter VCNO (Voltage Controlled Noise Oscillator) is a 6HP Eurorack module designed to generate a comprehensive spectrum of pure white noise. Utilizing analog components and logic integrated circuits, the VCNO employs a Linear Feedback Shift Register (LFSR) algorithm to produce diverse noise textures. This module offers three distinct noise outputs: Screech, Sizzle, and Tear, each with dedicated outputs for simultaneous use and creative sound design.

Image: Front panel of the Hexinverter VCNO Noise Oscillator Eurorack Module, showing controls for Pitch, Div, Sizzle, and various audio outputs including Noise, Scrch, Gates, Sizzle, Tear, and Clock.

Setup

To integrate the VCNO module into your Eurorack system, follow these steps:

1. Power Off: Ensure your Eurorack case's power supply is completely turned off before installing any modules.
2. Locate Space: Find an available 6HP space in your Eurorack case.
3. Connect Power: Carefully connect the ribbon cable from your Eurorack power bus board to the 10-pin header on the back of the VCNO module. Ensure the red stripe on the ribbon cable aligns with the -12V pin on both the module and the bus board. Incorrect connection can damage the module.
4. Mount Module: Secure the module to your Eurorack case using the provided screws. Do not overtighten.
5. Power On: Once securely mounted and powered, turn on your Eurorack case's power supply.

For detailed information on Eurorack power and installation, consult your Eurorack case's manual.

Operating Instructions

The VCNO module offers intuitive controls for shaping its noise output. Familiarize yourself with the front panel controls and outputs:

Controls:

• PITCH Knob: This large knob controls the overall pitch or frequency characteristic of the noise. Adjusting this knob will alter the spectral content of the generated noise.
• DIV Input: A CV input for external control over the noise division or character.
• SIZZLE Knob: This knob adjusts the intensity of the "Sizzle" noise component, which can evoke a vinyl-style crackling effect. Turning it counter-clockwise will increase this effect.
• PITCH CV Input & Attenuator: This input allows for external voltage control over the PITCH parameter. The small attenuator knob next to it adjusts the amount of incoming CV applied to the PITCH.

Outputs:

• NOISE Output: The primary output for the core LFSR white noise.
• SCRCH (Screech) Output: Provides a turbulent, overtone-rich variation of the primary noise.
• GATES Output: Generates gate signals derived from the noise, useful for triggering other modules.
• SIZZLE Output: Dedicated output for the "Sizzle" noise component, offering a distinct crackling texture.
• TEAR Output: Produces a chaotic, self-destructing noise effect, adding a flurry of aural chaos.
• CLOCK Output: Provides a clock signal, likely derived from the internal noise generation process, for synchronization with other modules.

Experiment with combining different outputs and modulating parameters with external CV sources to explore the full sonic capabilities of the VCNO.

Maintenance

The Hexinverter VCNO module is designed for durability and requires minimal maintenance. Follow these guidelines to ensure its longevity:

• Cleaning: Use a soft, dry cloth to wipe the front panel. Avoid abrasive cleaners, solvents, or excessive moisture, as these can damage the finish or internal components.
• Environment: Operate the module in a clean, dry environment. Protect it from dust, extreme temperatures, and humidity.
• Handling: Always handle the module by its edges. Avoid touching the circuit board or components on the rear of the module.
• Power: Always power down your Eurorack system before installing, removing, or re-patching power cables to the module.

Troubleshooting

If you encounter issues with your VCNO module, consider the following common troubleshooting steps:

• No Power/Lights:
  • Ensure the Eurorack case is powered on.
  • Verify the power ribbon cable is correctly connected to both the module and the bus board, with the red stripe aligned to -12V.
  • Check if your power supply has sufficient current for all modules.
• No Sound Output:
  • Confirm patch cables are securely connected to the desired output jacks and to an audio interface or mixer.
  • Check the volume levels on your mixer or audio interface.
  • Ensure the PITCH and SIZZLE knobs are not set to extreme positions that might result in inaudible frequencies.
• Unexpected Noise Behavior:
  • If using external CV, ensure the CV source is within the expected voltage range for the VCNO.
  • Check for any short circuits or loose connections in your patch cables.

If problems persist after following these steps, please contact Erica Synths support for further assistance.

Specifications

Warranty and Support

Erica Synths products are manufactured to high standards and undergo rigorous quality control. For information regarding warranty terms and conditions, please refer to the official Erica Synths website or contact their customer support directly.

Erica Synths Official Website: www.ericasynths.lv

For technical support, troubleshooting beyond this manual, or service inquiries, please reach out to Erica Synths support channels.