Murky Surround (Audacity Nyquist Plugin)

An experimental spatial audio tool designed for creating deep, immersive, and "murky" soundscapes. Unlike standard stereo wideners, this plugin focuses on low-frequency atmospheric textures and phase-shifting techniques to envelop the listener. Overview

Murky Surround was developed as a specialized tool for plunderphonics, lo-fi, and ambient music production. It excels at taking mono or narrow stereo sources and transforming them into a wide, cavernous space without losing the "dark" character of the original sound.

The plugin uses a combination of:

• Dual-band EQ: Preserving the core while slightly lifting the presence.

• Isolated Wet Reverb: Extracting 100% of the reverb tail.

• Phase Inversion & Time Offset: Utilizing a 20ms+ delay and inverted phase to create a massive psychoacoustic stereo image.

• DSP "0.999" Trick: Ensuring digital stability and preventing clipping during phase summation.

Installation

• Download the murky-surround.ny file.

• Open Audacity.

• Go to Tools -> Nyquist Plugin Installer.

• Select the downloaded file and click Open.

• Restart Audacity or check Effect -> Murky Surround.

Controls

• Reverb tail length (sec): Controls how long the "murk" lingers.

• Right channel delay (ms): Adjusts the spatial offset. 20ms is the sweet spot for the Haas effect.

• Murkiness volume (%): The intensity of the low-pass filtered reverb tail.

• Output gain (dB): Final volume adjustment.

• Right channel inversion: Toggles phase inversion for ultra-wide "out-of-head" experience.

License

This project is licensed under the MIT License — see the LICENSE file for details.

Credits

Developed by RedMoth in collaboration with Gemini (Google AI).