Hit Capture system audio, pick the tab or Entire screen, and tick the “Share audio” box in Chrome's popup. Video feed is discarded — only sound is used. Every frame is fed back through a warp shader — zoom, rotation, drift and decay riding the music.
Got a game controller? Plug it in and press any button. Shoulders flip through 150 presets in fifteen banks, the sticks are live knobs — hue, speed, spin, zoom — triggers are trails and boost, and holding LB opens a second layer of effects. Hold LB and the sticks fly the shader itself — warp, decay, rotation, zoom drift. The full control map pops up when the pad connects, and MENU (or C) brings it back any time.