b1rdmania
107 lines
4.3 KiB
Markdown
107 lines
4.3 KiB
Markdown
# MOTIF Project - Thursday Status Report
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## Project Overview
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**MOTIF** is a procedural music synthesis system that extracts structural information from existing MIDI files and recreates them as original, real-time audio using Web Audio API. The core concept: "music as executable structure, not static audio."
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### Workflow
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1. User searches for a song by name
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2. System finds MIDI files from multiple sources (BitMidi, Dongrays)
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3. MIDI is parsed and analyzed for structural features (tempo, density, melodic patterns)
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4. Notes are mapped to synthesis "roles" (bass, drone, ostinato, texture, accents)
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5. Web Audio API generates procedural audio with similar "feel" but original sound
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## Current Status: Functional MVP
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### ✅ Completed Features
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**Complete Search Pipeline**
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- Multi-source MIDI search with confidence scoring
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- Real MIDI integration with fetching and parsing
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- Graceful error handling and timeouts
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**Role-Based Synthesis Engine**
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- Intelligent mapping of MIDI tracks to synthesis layers
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- Role-specific oscillator types and filtering
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- Velocity-sensitive ADSR envelopes
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- Polyphonic chord support
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- Automatic looping and proper cleanup
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**Polished User Interface**
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- Search results table with confidence bars and quality analysis
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- Dual player UI: Preview Original MIDI vs Generate Motif
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- Real-time status updates and progress feedback
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- "Try Next Result" workflow for easy A/B testing
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**Backend Infrastructure**
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- Express + TypeScript server
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- CORS proxy with validation and SHA256 disk caching
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- Multi-source search (BitMidi, Dongrays, synthetic fallback)
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- Quality assessment with penalties for problematic content
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### 📈 Recent Progress (Latest Commit)
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**Major UI/UX Improvements:**
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- Implemented search results table with metadata display
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- Added MIDI preview player with basic oscillator mapping
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- Built dual transport controls for comparison
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- Integrated ParsedMIDIInfo with comprehensive track analysis
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- Enhanced confidence scoring system with quality penalties
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**Technical Enhancements:**
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- Sophisticated role mapping with pitch range and density analysis
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- Improved error handling across the pipeline
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- Better synthesis scheduling with Web Audio lookahead
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- Streamlined search-to-synthesis workflow
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## Current Problems & Limitations
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### 🔴 Performance Issues
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- **~70% search success rate** (goal: >90%)
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- **~30% musical similarity recognition** (goal: >70%)
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- HTML regex parsing is fragile (should use DOM parsing)
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### 🟡 Feature Limitations
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- Basic role mapping heuristics (lacks harmonic analysis)
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- Simple synthesis timbres (basic oscillators only)
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- Limited MIDI source coverage
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- No user controls for synthesis parameters
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### 🟠 Technical Debt
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- Need more robust parsing for edge cases
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- Search confidence scoring could be more sophisticated
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- Some synthesis roles need refinement
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## Next Sprint Priorities
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### Phase 1: Core Stability (Next 1-2 weeks)
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1. **Improve search success rate** - better error handling, additional sources
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2. **Enhance role mapping** - add harmonic analysis, rhythm detection
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3. **Polish synthesis** - more interesting timbres, dynamic control
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4. **Robust parsing** - replace regex with proper DOM parsing
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### Phase 2: Musical Intelligence (2-4 weeks)
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1. **Smarter scoring** - melodic similarity, harmonic progression analysis
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2. **Advanced synthesis** - effects, modulation, realistic instruments
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3. **User controls** - synthesis parameter adjustment, role customization
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4. **More MIDI sources** - expand search coverage
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### Phase 3: Production Ready (1-2 months)
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1. **Performance optimization** - caching, preloading, worker threads
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2. **Legal compliance** - proper attribution, copyright handling
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3. **User uploads** - allow custom MIDI file analysis
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4. **Production infrastructure** - deployment, monitoring, scaling
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## Technical Architecture
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**Backend:** Express + TypeScript with multi-source search, CORS proxy, and caching
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**Frontend:** TypeScript + Vite + Web Audio with real-time synthesis
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**Key Components:** MotifEngine, RoleMapper, SynthesisEngine, MIDIPlayer
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## Demo Status
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✅ **Ready to demonstrate** - Full end-to-end pipeline functional
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✅ **User-friendly interface** - Polished search and playback experience
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✅ **Comparative validation** - Side-by-side original vs synthesis preview
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The project successfully proves the core concept and is ready for user testing and iterative improvement. |