Checklist ROAI 2026 National Stage, Grades 11–12 · Task 2
Music Sheet Optimizer
Read synthetic sheet-music images: count the notes, compute the total duration and transcribe each note as pitch and duration.
The task
Sheet-music images contain single notes placed left to right on a staff, without chords. Pitch (A–G) is given by vertical position and duration (1/1, 1/2, 1/4, 1/8, 1/16) by the note's appearance (hollow or filled head, stem, flags), as illustrated in the starter kit.
For every test image the contestant must give the number of notes, the sum of their durations and a transcription of the form 'A-1/1 B-1/2 …' in left-to-right order.
Abridged by SOTA from the official materials. The official statement has the exact rules, and it wins wherever this summary differs.
At a glance
- You get
train_data/ with an empty staff image and an image of all note durations;test_images/ (IDs 0–1999 in the submission format); starter kit withexplanation.png,example.pngand helper code.- You submit
- CSV with subtaskID (1–3), datapointID (image ID) and answer (note count, total duration, or Pitch-Duration sequence).
- Scoring
- Subtask 1 (20 points): share of images with the correct note count. Subtask 2 (50 points): MSE of the total duration; full marks below 0.015, otherwise logarithmic partial credit from a baseline of 500. Subtask 3 (30 points): an image scores 0 if the note count is wrong, otherwise pitch-and-duration accuracy; full marks above 0.98, linear partial credit from 0.5.
- Rules
- On-site at Genesis College, Bucharest, through the Nitro Contestant Cloud
- Only the packages listed in the round rules may be used
- Only submissions selected by the contestant count towards the final ranking
- Format
- ROAI 2026 national stage, grades 11–12 section, 7 April 2026.