lamm-mit chord-analysis
Performs harmonic analysis on a music corpus using music21. Takes corpus JSON (from music-corpus skill) or a query string, runs Roman numeral analysis, and returns chord progression frequencies and transition matrices.
Usage
python3 skills/chord-analysis/scripts/chord_analysis.py --query "bach"
python3 skills/chord-analysis/scripts/chord_analysis.py --query "bach" --input-json /path/to/corpus.json
Output
{
"query": "bach",
"n_pieces_analysed": 10,
"chord_progressions": [
{"chord": "I", "roman": "I", "count": 142, "frequency": 0.18},
{"chord": "V", "roman": "V", "count": 98, "frequency": 0.12}
],
"top_bigrams": [["I", "V"], ["V", "I"], ["I", "IV"]],
"transition_matrix": {"I": {"V": 0.34, "IV": 0.21}},
"total_chords": 782
}
Dependencies
- music21