How it works

From a recording to a page

Five steps, a few minutes, and nothing you have to install.

1. You give us the recording

Upload a video or sound file from your phone or computer, or paste a link. Solo piano, up to twenty minutes long, up to 200 MB. We pull the sound out of a video ourselves.

2. A listener writes down every note

A neural network trained on thousands of hours of piano playing listens to the recording and writes down each note it hears: when it started, when it stopped, how hard the key was struck, and how sure it is.

3. We find the beat and tidy up

The notes are lined up on a beat, the two hands are separated, notes smeared together by the sustain pedal are trimmed, and tiny ghost notes are dropped. We follow the player as they speed up and slow down.

4. The score is engraved

The notes become a proper piano score with a key signature, time signature, bar lines, ties, and beams, set the way a publisher would set it. Notes we are not sure of are printed in grey.

5. You read it, print it, or move it

Read it on the page, download a PDF, open it in MuseScore or any notation program, or change the key. A MIDI file of the exact performance comes along too.

What it is good at, and what it is not

Clean recordings of one piano come out well. The machine struggles with singing or other instruments over the piano, very free playing with no steady beat, fast ornaments, and hands that cross. Pieces in three-four or with a pickup bar may need their bar lines fixed in MuseScore. We will never print a percentage and call it accuracy; the example on the front page is a real, unedited result.

Questions? Write to [email protected].