MUSA — AI Music Creation Assistant

MUSA is an AI assistant that empowers musicians without replacing them. It analyzes, suggests, and organizes — creativity stays human.

Key features:<br/>- Key detection and harmonic analysis of tracks<br/>- Chord suggestion engine based on music theory and AI<br/>- Song structure analysis (intro, verse, chorus, bridge, outro)<br/>- Audio stem separation with Spotify Basic Pitch<br/>- Collaborative workspace for music projects<br/>- Integrated audio player with Tone.js and waveform visualization<br/>- 49 API endpoints, 9 database tables<br/>- Audio file storage on Cloudflare R2

Architecture: Next.js frontend + Fastify backend (Node.js) + Python FastAPI microservice for audio processing.<br/>293 files, ~50,000 lines of code.