Notation Spine

Key

–

Chord

–

Tempo

–

＋ song ＋ xml ＋ sheets ♫→xml bpm

0:00 / 0:00

song = STFT + Krumhansl + template chords · sheet = MusicXML · photo = Claude vision → MusicXML
top bar = scrub/seek · click notes = sequence · drag = pan · wheel = zoom

How to read

colour = pitch class · lit = sounding now

▬Height = pitch · piano keys at left

A♭Top row = chord per bar

┊Vertical lines = beats · bold = bars

┃Cyan = reading head · pulses on beats

Anthropic API key

Reading a sheet-music photo or PDF sends the image to Claude (vision → MusicXML). Paste an sk-ant-… key. It's saved only in this browser (localStorage) and used solely for that request — the image goes to Anthropic's API, nothing else leaves your machine.

Prefer no key? Run the local Audiveris bridge — node omr-bridge.js — and this fully-offline engine is used automatically instead.