music21-score

To extract Roman numerals from a MusicXML score, load the symbolic file to parse Score, Part, and Measure objects, then convert chord events into Roman-numeral labels relative to detected keys for harmonic progression analysis.

Yes, music21 can check for parallel fifths and octaves by processing Note and Chord objects within Score streams, detecting voice-leading violations between two specified melodic lines for music-theory quality assurance.

The best way to analyze melodic contour is by parsing symbolic music scores with music21 to compute melodic interval statistics and extract progression labels for downstream statistical or visualization tasks.

You can compare harmonic patterns across Bach chorales by using music21’s built-in corpora to load Score objects, extracting harmonies and Roman numerals, and performing corpus-based comparative studies.

You need symbolic music files like MusicXML to construct music21 objects such as Score, Part, and Measure, which are required for deterministic parsing, feature extraction, and progression labeling in computational musicology workflows.