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11c894bd91
Backend (MVP): - Express API with /search and /fetch endpoints - BitMidi and Dongrays search adapters with scoring heuristics - CORS proxy with disk caching and validation - Quality assessment and file size limits Frontend Integration: - Switch to @tonejs/midi parser for reliable MIDI parsing - MIDIService for backend API communication - MotifEngine updated to try real MIDI, fallback to synthetic - Enhanced error handling and logging Development: - Concurrent frontend/backend npm scripts - Basic project documentation 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <noreply@anthropic.com>
1.7 KiB
1.7 KiB
MOTIF
Procedural Music Synthesis from MIDI Structure
Motif extracts structural information from existing music and re-instantiates it as original, real-time audio using the Web Audio API. Music as executable structure, not static audio.
Quick Start
# Install dependencies for both frontend and backend
npm install
cd server && npm install && cd ..
# Run both frontend and backend
npm run dev:all
# Or run separately:
npm run dev:backend # Backend on :3001
npm run dev # Frontend on :3000
Architecture
- Frontend: TypeScript + Vite + Web Audio API
- Backend: Express API for MIDI search and fetching
- MIDI Sources: BitMidi, Dongrays (with synthetic fallback)
- Synthesis: Pure procedural Web Audio (no samples)
How it works
- Search for MIDI by song name
- Extract structural features (tempo, density, roles)
- Map to synthesis layers (bass, drone, ostinato, texture)
- Generate original audio with similar "feel"
Project Structure
src/
├── core/ # MotifEngine, RoleMapper
├── synthesis/ # Web Audio synthesis engine
├── midi/ # MIDI parsing and processing
├── services/ # Backend API client
└── types/ # TypeScript interfaces
server/
├── src/
│ ├── adapters/ # MIDI search adapters
│ ├── services/ # Search and fetch logic
│ └── utils/ # Scoring and validation
└── cache/ # MIDI file cache
API
GET /api/midi/search?q=song- Search for MIDI filesGET /api/midi/fetch?u=url- Fetch and validate MIDI
Built as a technical experiment in procedural audio and Web Audio capabilities.