Advanced AI Prompt for Audio-Reactive Three.js Particle Systems

Act as a Senior Creative Technologist. Architect a robust Three.js script for an immersive, audio-reactive particle system background. Utilize a highly optimized `BufferGeometry` approach to efficiently manage [PARTICLE_COUNT] (e.g., 500,000) particles. Deeply integrate the native Web Audio API to process the [AUDIO_SOURCE] via an `AnalyserNode`, mapping real-time frequency data arrays directly to the [REACTIVE_BEHAVIOR] (e.g., scaling, velocity, or turbulence). The visual output must strictly adhere to the [COLOR_PALETTE] hex scheme. Crucially, implement custom GLSL Vertex and Fragment shaders to handle all particle displacement and color interpolation natively on the GPU, avoiding CPU bottlenecks. Provide the comprehensive scene setup and the `requestAnimationFrame` loop where frequency data is passed as dynamic uniforms to the shader.