Fingering Atlas

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Fingering Atlas

Library

Source inspection

Open a score

Choose an MEI score and its matching fingering JSON file. Files stay on this device.

Supported files

Use Fingering Atlas JSON matched to this exact score. It can contain your written fingering or results from a separate analysis tool. Raw dataset files and videos need preparation first; see the README. Up to 5,000 note onsets and 40 fingerings.

Fingering sources

Score and attribution

Fingering Atlas

Read
Choose one edition or pianist. Right-hand digits appear above the staff, left-hand digits below. These positions help separate the hands; they do not reproduce the printed page.
Compare
Choose A and B. Their digits appear in blue and magenta; orange notes mark disagreements. Use Next difference to find them.
Entropy
See where sources agree and disagree. Click a note to see its fingerings. Click a graph bar to inspect a note on that staff.
Find a score

The site opens with Chopin’s Op. 10 No. 1. Use Library to browse the editions, or switch pieces from the menu at the top right. View in IMSLP opens the selected printed edition. This site shows its transcribed fingerings on a shared reference score.

Check the sources

Click an edition name in Library or a note’s details to open it in IMSLP. Some fingerings were transcribed with AI and still need checking. Open Source records and score credits below to see what has been checked.

Entropy includes all editions, including drafts. Each edition counts once at each note. A complete score can contain unmarked notes.

Attribution and licences

Reading the score and entropy

Click a note to select it. Hold Shift and click another note to select a passage. Arrow keys move between notes; Shift-arrow extends the passage. Bar 0 means a pickup. Digits show the finger used when a note starts. Later finger changes remain in the saved history.

Entropy measures how much the sources disagree about the starting hand and finger, in bits. Zero means they agree. It does not tell you how difficult a passage is or which fingering to choose.

Measured notes run from grey for agreement to orange for the most disagreement in this piece. Notes with fewer than two fingerings also stay grey; click a note to check its sources. Graph bars use the same colours, and their height shows average disagreement in bits. A dotted baseline means there are too few fingerings to compare. Colours adjust to each piece and source group, so compare the bit values when comparing pieces.

Each graph bar averages the notes on one staff that have at least two fingerings. Each edition or pianist counts once. If two readings from the same source conflict, that source does not count at that note. Unresolved alternatives, later finger changes and tied continuations do not count. The two rows follow the staves, which may contain notes played by either hand.