LoanDeveloper/music-visualisation-3d ? reverse-engineered prompt

Build me a real time 3D music visualizer web app where sound turns into moving particles in a dark, cinematic scene. I want the particles to react live to the music, with the motion, color, and intensity changing based on the beat and frequency ranges so it feels alive and expressive.

Make it smooth and performance friendly, since there could be a lot of particles on screen. It should work in the browser, let me load or play music, and give me simple controls for things like start, pause, volume, and maybe switching visual styles or color themes. I want the main focus to be the 3D visual experience, not a complicated UI.

Use current best practices for the web audio and 3D rendering parts, and if you need to look up anything current online, feel free to do that. Keep it polished, responsive, and ready to run locally.