Tests alternative weightings (33/33/33, 70/15/15, 40/40/20) to show how TSE's 50/25/25 weighting is arbitrary and affects results.
Challenges assumption that transposed temperaments are equivalent. Shows cases where rotation improves match but significant musical differences remain.
Demonstrates that comma fractions (1/4, 1/5, 1/6) are arbitrary divisions of a continuous spectrum, not meaningful boundaries.
Tests sensitivity to "very similar" threshold (0.75, 0.80, 0.85, 0.90) showing large changes in results from small threshold changes.
Questions whether 2.8% "very similar" rate is significant, analyzes perfect matches for potential data duplication, challenges historical attribution validation.
Uses Manhattan distance, Chebyshev distance, cosine similarity, and structural similarity to reveal relationships TSE misses.
Finds well-temperament and meantone family relationships that TSE classifies as dissimilar due to focus on exact comma fractions.
Found significant differences between TSE's 50/25/25 weighting and alternatives. For example, "1/3 Syntonic ↔ 1/6 Syntonic" shows TSE Standard = 53.7%, but Equal Weight = 14.3% (39.4% difference).
Processed all 192 temperaments (83 from PianoScope/Fred, 109 from CyberTuner/Chip2) for a total of 18,336 pairwise comparisons.
Identified 7 cases where temperaments share historical attribution (e.g., Broadwood, Ellis, D'Alembert, Kirnberger), raising questions about circular reasoning in validation.
The parameterized weighting system allows running all analysis scripts with different weighting schemes, enabling systematic exploration of how weighting choices affect results.
TSE Standard (50/25/25) - Original TSE weighting
Equal Weight (33/33/33) - No component preference
Fifths Dominant (70/15/15) - Strong emphasis on fifths
Musical Focus (40/40/20) - Balance fifths and thirds
Thirds Emphasis (30/50/20) - Emphasize major thirds
Commas Emphasis (30/20/50) - Emphasize comma patterns
The comparison script identifies robust relationships (hold across multiple schemes) vs. artifacts (only appear under specific weightings), providing validation of TSE's methodology.