👯 Duplicates the same music published more than once

All Same notes Same arr. Same piece Likely Any Undecided Decided ⚠ Different owners

What this page is. tools/find_duplicates.py compares every piece in the catalog by its music, not its title — the sorted multiset of (onset, pitch, hand) finds copies that are the same file under two names, and a transposition-invariant melody fingerprint finds the easy versions, excerpts and one-hand reductions cut from a longer piece. Titles alone miss both: two of the pairs here share no word at all, and two that look like a deliberate "(Lesson Version)" pair turn out to be the same file uploaded twice.

How to review. The sentence at the top of each cluster says what actually differs; every figure that is not the same across the copies is highlighted, and a left hand of 0 means a right-hand-only reduction. The piano roll is blue for the right hand, orange for the left — two identical pictures mean two identical files. ▶ plays the first twenty seconds. [ ] walk the clusters, Esc stops the sound.

Before you remove one. The chips on each card are what points at that slug — a copy carrying real players' scores, a zone board, a ladder or Excalibur phrases is the one to keep. A card marked named in the code needs a source edit as well as a delete, and loose ends lists the few rows admin_delete_piece will not clear because it predates those tables — escrowed commission coins, a booked recital, an advertised concert. (Everything else it misses is inert: Excalibur, the ladder and the sections all read their tables through the live catalog, so a deleted piece drops out of them by itself.) And ⚠ different owners means the copies belong to different people: a private piece is that player's own library, and removing it takes their piece away rather than tidying yours.

Your decisions live in this browser (up-dupreview) and survive a reload — download the list to keep them. Delete them calls app.admin_delete_piece and is admin-only; it cannot be undone. Re-run python3 tools/find_duplicates.py afterwards to refresh this page.