Photograph a page of sheet music. Or simply play the melody. Either one becomes properly engraved notation — readable, playable, in any key you like.
Two ways in
One page, one photograph. Two recognisers run side by side, and the winner is not decided by which vendor you trust but by whether every bar actually adds up rhythmically. The better one supplies the notes; lyrics and chords from the other are carried across.
Play the melody, or hand over a recording. From there it is the same pipeline: the same engraving, the same rules, the same result. Not a second, weaker tool for the days when there is no sheet in front of you.
What it turns into
A recogniser gives you pitches. Whether those become a page a musician can sight-read is decided by the craft behind it — the conventions by which music has been engraved for centuries.
Measured, not claimed
There is a fixed benchmark with ground-truth data. Anyone quoting a figure here quotes the corpus and the date along with it. What cannot be measured does not count as progress.
Internal benchmark, as of September 2026. These numbers will change — upwards, and traceably.
The price
Anotona stays free.
Not free for the first year. Not free until the next funding round. Free. Being able to read music is not a feature you sell people — and the tools for it shouldn't be either.
Status
Anotona is being built. Recognition works, the engraving is in place, the app runs on iPad and Mac; the Android version is taking shape. There is no public release yet.