Flexi - predator-prey-spirals
Flexi
Two populations locked in eternal audio-reactive pursuit.
Flexi modeled the Lotka–Volterra predator-prey equations as a visual field and wired the equilibrium point to incoming audio energy. When the music is quiet the populations stabilize into slow spirals; louder passages tip the system toward chaotic oscillation. It is a physics simulation that happens to be beautiful.
- Artist
- Flexi
- Category
- Essential Fractals
- Engine
- Butterchurn / MilkDrop
- Runs in
- Browser · Zero install
The core fractal lane. Dense recursion, spiral pull, reaction-diffusion, and the signatures that make the whole medium feel unmistakably MilkDrop. These presets are the reason people have been running visualizers for two decades.
Recursive tunnels, artifacts, and deep mathematical pull.
Audio-reactive shaders, running entirely in your browser.
Upload any audio
Drag in a local file, connect a mic, stream a radio URL, or use one of the included sample tracks.
Real-time analysis
The Web Audio API analyses frequency content, amplitude, and transients at up to 60 fps, all without leaving your tab.
Shader renders the result
Butterchurn translates that data into GLSL shader parameters. Flexi - predator-prey-spirals maps those parameters into its own visual language.
See Flexi - predator-prey-spirals respond to your music.
No account. No install. Works in any modern browser with WebGL2 support.
Open visualizer with this preset
