UltraFXR

Generate sound effects and music
for your game or demo

In development. Not yet ready for use.

UltraFXR builds sound effects and music out of simple modules and audio processors. At the touch of a button, create a randomized sound effect from a template like “explosion”, “powerup”, or “metallic clang”. Tweak the sound effect parameters to your heart’s content, or dive in deep and design your own sound effects by writing code.

Examples

These are sound files generated by UltraFXR or by its prototype.

Clang: The sound of a sword striking metal. Made using FM synthesis.
Sylvan Path: A background music track featuring three instruments: synth bass, harp, and synthesizer. The synth bass and synthesizer are subtractive synths, and the harp uses FM synthesis.
Click: A click sound for menus. Made using FM synthesis.
Monster Death: An explosion, for when a monster dies.
Sweep: A filter sweep, showing off UltraFXR’s resonant filters.

Inspirations

UltraFXR is inspired by other projects. UltraFXR’s goal is to be more powerful and flexible than SFXR or its clones, but simpler than the more powerful systems like Reaktor or Supercollider.

CSound, a system for electronic audio and music originally released in 1985.
Reaktor, a commercial graphical modular synthesizer originally released in 1996.
Supercollider, a free, open-source modular synthesizer originally released in 1996.
FAUST, a programming language for audio signal processing originally released in 2002.
SFXR, a sound effect generator developed in 2007. Minimal and highly useful.
as3fxr, a port of SFXR to Flash written in 2010.
BFXR, a modified version of as3fxr with new features, written in 2011.
JFXR, a port of BFXR to JavaScript with a bit more UI polish, originally released in 2014.
VCV Rack, a virtual rack synth originally developed in 2017.

Roadmap

Minimum Viable Product

Design format for compiled audio programs
Create JavaScript synthesis library
Create web app with a small selection of sound effects programs
Publish synthesis engine on NPM

The Path to 1.0

Clean up and expand set of operators
BFXR compatibility
Port synthesis engine to WebAssembly
Remove transcendental functions from synthesis path
Document and package command-line tool
Document audio language

More Info

GitHub: https://github.com/depp/ultrafxr

Twitter: @DietrichEpp