Piano Simulator 1000

Alpha 1 — QA Candidate 2

build alpha-1-qa-rc2+68f6c56 · 2026-09-23

This is a QA candidate, not a release. It is here so a few people can break it before anything is called "Alpha build 1". Everything below was produced automatically from a recording and published unedited — the mistakes are the point.

What changed: Two more songs, NF — HAPPY and Somewhere Out There. The transcription engine is identical to RC1: NieR's and Silo's scores here are byte-for-byte the ones RC1 published.

Open a song, press play, and the notation and keyboard follow the recording. Tap a bar to jump there; loop a few bars and slow them down. Nothing to install, nothing to sign in to, and nothing you do here is sent anywhere.

The songs

• NF — HAPPY

  Piano version by keudae · music by NF

  4:18

  Open NF — HAPPY

• NieR:Automata — Soundtrack Medley

  Piano arrangement by Animenz · music by Keiichi Okabe, Keigo Hoashi and Kuniyuki Takahashi

  15:45

  Open NieR:Automata — Soundtrack Medley

• Silo Season 2 Episode 4 Outro Song

  Music by Loney Dear

  0:55

  This recording is not a piano — it has vocals, synths and percussion. The piano model declined to hear most of it, so this page is deliberately sparse. That is the finding, not a bug.

  Open Silo Season 2 Episode 4 Outro Song

• Somewhere Out There

  Piano solo by Kyle Landry · music by James Horner and Barry Mann

  4:05

  Open Somewhere Out There

What to test

1. Does it sound like the song? Play the recording, then the generated piano. Notes that are missing, invented or in the wrong octave are the most useful thing you can find.
2. Can you read it? Look at the notation while it plays. Is the music on a staff that makes sense, and can you follow a line with your eye?
3. Can you practise from it? Loop a few bars, slow them to 50%, switch to one hand. Does the loop land where you asked, and stay there?
4. Does it break? Seek around, change speed mid-phrase, switch between the recording and the piano, turn your phone sideways, reload the page.

For the musician reviewers

These links open on the passage and loop it. The question is not whether the notes are right — it is whether a person could read and play what is on the page.

• NieR — bars 83–90 The passage PD-3 was built for: the left hand used to be stranded on a bass staff it had left. This is where the staff distribution should be visibly better.
• NieR — bars 93–119 What happens around that change. A repair that fixes one passage and unsettles its neighbours is not a repair.
• NieR — bars 1–22 Ordinary two-staff writing that PD-3 should not have touched. If anything here reads worse than it used to, that is a regression.
• NF — bars 20–45 This song opens with both staves in bass clef and the upper staff changes at bar 24 and again at 41. Does the page follow the music, or does it just keep changing its mind?
• NF — bars 70–85 Two more changes close together, at 73 and 77. Short alternations are where clef planning is most likely to be annoying to read.

For each one, we would like to know:

• Are the clefs and staff changes easier to read?
• Are the musical lines easy to follow?
• Are there remaining collisions or overcrowded passages?
• Could you actually practise this section?

Report an issue

Known limitations

• The notes and the rhythm are worked out automatically, and both are imperfect. There is no accuracy figure to quote and we are not going to invent one.
• Solo piano and mixed-instrument music are different problems. A piano recording is what this is built for; a song with vocals, synths and drums is much harder, and one of the two songs here is exactly that case.
• Dense passages can still be hard to read.
• Conventional printed pickups (upbeats) are not finished.
• MIDI keyboard support depends on your browser: Chrome and Edge on desktop can do it, Safari and Firefox generally cannot. Without a keyboard the page still plays and lights the notes — it just does not grade you.
• No physical MIDI keyboard has been tested on this build. The MIDI path has been exercised with a simulated keyboard only.
• An experimental metrical analysis that we measured and rejected is switched off here.

What this build is not

You cannot add your own song: turning a recording into a page needs a machine with the models on it, and that is done on our side. There are no accounts, no uploads and no payments. A "faithful score" here means the page shows what the app decided — not that what it decided matches the original recording.