Education & Reference
lumikey
Last updated 2026-09-17 · benchmark measured 2026-11-03 — deterministic & reproducible
Lumikey is a piano learning app that transcribes audio into a playable piano roll.
lumikey at a glance
Lumikey is a desktop app that transcribes MP3s, MIDI files, or YouTube links into a scrolling piano roll so piano learners and musicians can play along, slow songs down, and practice each hand separately.
Good for
- Learning to play a specific song from a YouTube video or audio file instead of a preset course library
- Practicing one hand at a time with the other hand playing itself
- Converting a piano recording into an editable, exportable MIDI file
Pricing
Free to try with 8 imports of your own songs plus 40+ classical pieces included; lifetime license is a one-time $29 payment with all future updates.
Questions people ask
Can I learn a piano song from a YouTube video?
Yes, paste the link into lumikey and it downloads the audio and transcribes it into falling notes; it works best on solo piano recordings. You can also drop in an MP3, WAV, other audio file, or a MIDI file.
Do I need a MIDI keyboard to use lumikey?
No, a MIDI keyboard connected over USB or Bluetooth gives the most precise note detection, but lumikey can also listen through your computer's microphone to an acoustic or digital piano.
Can I practice one hand at a time and slow songs down?
Yes, wait mode stops the song at each chord for the hand you choose while the other hand plays itself, and you can slow any song to a quarter speed and loop a section.
Is there a subscription, and how much does lumikey cost?
There is no subscription; lumikey is free to try with 8 imports of your own songs, and a lifetime license is a one-time $29 payment that includes every future update.
Does lumikey work offline and are my recordings uploaded?
Transcription, hand detection, and playback all run on your computer and nothing you import or play is uploaded; the internet is only needed to fetch a YouTube link or check for updates.
Written by Legit.Show from lumikey.app on 2026-11-02. It does not change the score.
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To cite this score: legit.show/s/lumikey-app/2026-11-03. That address never changes; this page moves with every re-measure.
Legit.Show scored lumikey 79/100 on 2026-11-03, measured across all 7 frames from its public surface. legit.show/s/lumikey-app/2026-11-03
Is lumikey production-ready?
Legit.Show scores lumikey 79 out of 100 — the simple average of its 7 measured frames. Legit.Show ran its deterministic 7-Frame production-readiness benchmark on lumikey (public-surface assessment), measured from the public surface with no LLM in the scoring path. Its strongest frame is Accessibility; its weakest is Security. Every frame it averages is published with its evidence on the Legit.Show listing.
The 7 Frames
- Performance — 65/100
- Accessibility — 100/100
- Security — 25/100How this compares across the catalogue: The Web Security Baseline
- Privacy — 70/100How this compares across the catalogue: The Privacy Gap
- Reliability — 100/100
- Standards — 92/100
- Discoverability — 100/100
What we measured
- No Content-Security-Policy and no HSTS.
- Served over HTTPS with a valid certificate.
- Real Lighthouse performance run — 243 ms to first byte.
- Returns a proper 404 for unknown routes.
- 1 of 1 sampled routes reachable.
- Has a reachable privacy policy.
- Sets cookies / loads scripts with no consent prompt.
- Discoverable: structured data, sitemap, OpenGraph image, canonical URL.
Who it's for
Piano learners · Musicians · MIDI keyboard users · Music students
Sources and updates
- Description
- Taken from lumikey.app's own website on 2026-09-17.
- Operator
- lumikey, as named in lumikey.app's terms, privacy page or footer.
- Benchmark
- Measured by Legit.Show from the live site, the way any visitor sees it — with no access to its code or accounts. Same method for every product, and no AI decides the score. Last checked 2026-11-03.
Put together from public information, without lumikey's involvement. If anything here is wrong, tell us and a person will check it.
Visit lumikey → · Alternatives to lumikey → · How this was measured →
