ayousanz/malody-data-metadata

Malody data archive — metadata and chart audit

The audited source, ayousanz/malody-data, contains 46 ZIP archives plus 1 split-7z first volume, totaling 51.59 GB in Git LFS. The source currently has no dataset card, declared license, language, task category, or Viewer-ready data files.

Reproducible inventory

HTTP byte ranges were used to read ZIP central directories and selected chart members; the 51.6 GB payload was not bulk-downloaded. The complete ZIP catalog has 63,909 entries: 19,819 audio, 10,327 images, 3 video, and 11,077 converted chart/metadata entries. No encrypted entries or unsafe traversal paths were found. All 46 ZIP indexes succeeded.

The audit transferred 171.89 MB in total (0.333% of the repository payload) and verified every selected member against its ZIP uncompressed size and CRC32.

Converted StepMania charts

• 11,076 .sm files parsed; 0 errors.
• 11,070 unique SHA-256 payloads and 6 exact-duplicate groups.
• 12,052 NOTES blocks; no zero-NOTES chart.
• 10,948 charts linked to an archive audio entry; only 127 tagged charts remain unresolved.
• audio resolution methods: {"tag_exact": 9367, "directory_singleton": 1575, "unresolved": 128, "sibling_tag_exact": 5, "song_group_singleton": 1}.
• song-ID-aware split: {"eval": 590, "train": 9972, "validation": 514}; leakage groups: 0.

Original Malody charts

• 11,287 .mc.old JSON charts parsed; 0 errors.
• 5,545 song IDs, 10,845 positive chart IDs, and 3,209 creators.
• 13,417,188 playable notes, 1,262,682 holds, and 385,054 sound events.
• 244 records use a missing/non-positive chart ID.
• 169 repeated positive chart-ID groups; 3 have differing payloads.
• one legacy file.sm.old was classified separately, and 1 Malody original lacks a current .sm conversion.

The enriched manifest links 11,076/ 11,076 converted rows to original metadata. 163 converted rows aggregate multiple original charts; inconsistent song-ID groups and split-leakage groups are both 0 and 0, respectively.

Recommended repair order

1. Add the generated Viewer-ready Parquet manifests and an explicit provenance card.
2. Review the unresolved audio links, three positive chart-ID payload conflicts, and the single unconverted Malody original before claiming conversion completeness.
3. Keep train/validation/eval allocation grouped by Malody song ID, as provided in the enriched manifest, to prevent alternate difficulties from crossing splits.
4. Document the converter name/version and the meaning of .mc.old, .sm.old, and the lone split-7z file.
5. Resolve redistribution rights per component. Music, artwork, video, and user-authored charts can have different owners; do not assign one umbrella license based only on a conversion tool's license.

Machine-readable outputs are under manifests/, analysis/, and data/. This metadata-only derivative does not modify the source Hub repository or bundle music, artwork, video, or archive payloads. No license is declared because the component rights have not been verified; absence of a license is not permission to reuse.