Recordings: Schubert, Piano Quintet in A major, Op.114, complete movements III, IV and V (MusicNet IDs 1728, 1729, 1730). Source collection: European Archive. Score transcriber in primary metadata: http://tirolmusic.blogspot.com/
MusicNet authors: John Thickstun, Zaid Harchaoui, Sham M. Kakade. Primary DOI: 10.5281/zenodo.5120004. Primary release: https://zenodo.org/records/5120004
The complete primary archive MD5 was actually verified. These recordings and labels were actually extracted from that verified release. Metadata declares CC-BY-4.0 and describes CC/public-domain recordings; individual source attribution and final contributor distribution/rights confirmation remain pending.
The public input concatenates complete original performances in order with four seconds digital silence between movements. Exact source identifiers and bounds are in movement_manifest.json. Source sample sequences were reread and checked exactly; no pitch/speed/level changes or source omissions. This benchmark construction is disclosed.
The brief and timed delivery contract are simulated. No commissioned client work is asserted. Reference uses hidden MusicNet score/MIDI alignment labels and actual REAPER reconstruction. Velocities are constructed from the mixed envelope, not independently measured per-instrument dynamics. Professional musical QC/calibration and measured expert time remain pending.
