Legal

Credits and licences

Last updated 2 October 2026

ClearyKeys and this website are written and designed by Lorcan Cleary. They also rely on work that other people have shared under open licences, listed here with thanks.

1The piano sound

The app’s piano samples come from the Versilian Studios VSCO 2 Community Edition, which Versilian Studios has placed in the public domain. They are used as prepared by the tonejs-instruments project by Nicholaus Brosowsky, shared under a Creative Commons Attribution 3.0 licence. The samples are stored inside the app, so the piano works offline, and the demos on this website use the same samples.

2Typefaces

Spectral, by Production Type
IBM Plex Sans and IBM Plex Mono, by IBM

Both are used under the SIL Open Font License 1.1, in the app and on this website. Spectral is copyright 2017 The Spectral Project Authors, and IBM Plex is copyright © 2017 IBM Corp., with Reserved Font Name “Plex”.

3Software and music symbols

lamejs 1.2.1, the LAME MP3 encoder in JavaScript, used unchanged to save recordings as MP3 files. github.com/zhuker/lamejs, under the GNU Lesser General Public License 3.0.
PDF.js 3.11.174, copyright Mozilla Foundation, used unchanged to open PDF scores. github.com/mozilla/pdf.js, under the Apache License 2.0.
The outlines of the clefs, notes, rests, accidentals and dynamics in the app, and of the clefs and notes on this website, come from abcjs, copyright Paul Rosen and Gregory Dyke. github.com/paulrosen/abcjs, under the MIT licence.

4Music and teaching material

Scale fingerings and spellings come from the scale book behind clearypianolessons.com, Lorcan Cleary’s teaching studio. The music the app shows in notation, such as the openings on its music paper, is by composers whose works are in the public domain, and the notes of those openings were taken from Mutopia Project editions. Other composers, some of whose works are still in copyright, are named in the app by name and title only. Sight-reading pieces are generated by the app for each player.

5Trademarks

ClearyKeys and the ClearyKeys logo belong to Lorcan Cleary. Google Play is a trademark of Google LLC. Exam boards named in the app, such as ABRSM, Trinity College London and the RIAM, are mentioned only to describe levels, and ClearyKeys isn’t connected to or endorsed by them.

6Contact

If you think something is missing or credited wrongly, email clearykeys@gmail.com and we’ll put it right.