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Author SHA1 Message Date
Michael Winter b20f02b60f Fix DCA Hamiltonian: normalize by max instead of sum 
- Change normalization from sum to max: visit_count / max^2
- This gives stronger discrimination toward unvisited nodes
- Weight 1 now gives 66.2% coverage (vs 63.6% baseline)
- Rename CLI: --weight-dca -> --weight-dca-voice-movement
- Rename CLI: --weight-hamiltonian -> --weight-dca-hamiltonian
- Restore DCA Hamiltonian display in analysis output
- Update README with new CLI names and factor descriptions
 2026-03-15 13:04:00 +01:00
Michael Winter 218d7a55ff Refactor DCA factor: rename to DCA Voice Movement and DCA Hamiltonian 
- Rename _factor_dca to _factor_dca_voice_movement (tracks voice pitch changes)
- Rename _factor_hamiltonian to _factor_dca_hamiltonian (tracks node visit counts)
- Update CLI: --weight-dca -> --weight-dca-voice-movement
- Update CLI: --weight-hamiltonian -> --weight-dca-hamiltonian
- Remove hamiltonian coverage from analysis (no longer tracking)
 2026-03-15 12:20:12 +01:00
Michael Winter ebbb288844 Implement weighted contrary motion factor 
- Half of moving voices should go one direction, half opposite
- Weighted by closeness to ideal half split
- factor = 1.0 - (distance_from_half / half)
- Works with odd (near-half) and even (exact half) voices
- Analysis shows contrary_motion_steps, percent, and avg_score
 2026-03-15 11:31:24 +01:00
Michael Winter 559c868313 Fix Hamiltonian analysis and add DCA stay count metrics 
- Save graph_path to output for accurate Hamiltonian tracking
- DCA analysis now shows avg/max voice stay counts
- Fix: use actual graph node hashes instead of rehashing transposed chords
 2026-03-15 11:13:24 +01:00
Michael Winter 34a6ebfabd Add per-factor analysis metrics 
- Melodic: violations, max violation, avg movement
- Contrary motion: steps with contrary, percentage
- DCA: avg voices changing, all voices change count/percent
- Hamiltonian: unique nodes, coverage percentage
- Target range: start/end cents, achieved percentage
- CLI: --stats now shows all metrics automatically
 2026-03-15 10:48:06 +01:00
Michael Winter 16ecb192d1 Add analysis tool for chord sequences 
- Add src/analyze.py: standalone analysis script
- Add --stats CLI flag to show stats after generation
- Analyze: melodic violations, target range %, voice changes
 2026-03-15 10:42:22 +01:00