Replace five narrow patterns (*.pt, *.pkl, train/, val/, holdout/) with
a single data/processed/ rule that also covers data/processed/user/.
All processed tensors are reproducible from committed .chord files.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
- src/dataset.py: ChordDataset wrapping .pt files with pad/truncate
- scripts/prepare_data.py: tokenize .chord to .pt with train/val/holdout
split, logs token length stats and style/function distributions
- src/external_converters/mcgill_to_chord.py: rewrite parser for real
McGill v2 format (2-column annotation, each bar in its own pipe group,
interval bass notation e.g. /5 and /b3)
- .gitignore: exclude data/processed/train, val, holdout subdirectories
- tests: 37 new tests for ChordDataset and converter (260 total, all pass)
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
H1K0