Reconstructing the fixed benchmark
manifest.csv identifies the 100 selected source scores by content ID (CID) and
MuseScore score ID. attribution.json preserves the available source links and
embedded credits. Obtain source scores from the original MetaScore distribution
or a source authorized to provide the work, respecting its terms.
Complete MIDIs in this release were converted from the corresponding MSCZ files
before selecting the fixed windows. The window builder is
preprocess/build_metascore_test.py in the DAMN development repository. Its
source and the serializer dependency are archived under reconstruction/ for
inspection and reproduction. They were archived from the local development
checkout on 2026-10-31; this is not a claim that the inference-only submission
repository contains the preprocessing pipeline.
Install reconstruction/requirements.txt. The archived portable config.py
replaces deployment-specific paths with relative placeholders; window parsing
and serialization are unchanged. From reconstruction/, with the original
directory structure restored, including all 100 source entries, use:
python -m preprocess.build_metascore_test --source /path/to/MetaScore-SFT-100 --output /path/to/rebuilt_challenge_test
Use a fresh output directory (or the builder's explicit --output option) to
avoid replacing the released original test artifacts. The protocol is a fixed
four-bar prompt plus optional pickup and a twelve-bar continuation.
For QmbQPgvc93q2bBKvPaVRWNJDvaxSB8kHxVKXxQD2W5W1Qx, rights_conflicts.json
lists all expected source/derived paths and their SHA256 checksums. Use the
source score/MIDI to the paths in manifest.csv and the window manifest;
compare checksums and rebuild the specified window. All 100 entries, window
indices and selection reasons remain fixed. This release intentionally does
not provide a downloader that bypasses the original source's access controls.