Licenses

Last updated 3 November 2026

ALL 12 is built with other people's work. Thank you.

Piano sound

Salamander Grand Piano V3 by Alexander Holm, licensed under Creative Commons Attribution 3.0. The MP3 versions come from the Tone.js audio repository and are served unmodified from this site.

Fonts

• Archivo by Omnibus-Type — SIL Open Font License 1.1
• IBM Plex Sans Condensed by IBM — SIL Open Font License 1.1
• Spectral by Production Type — SIL Open Font License 1.1
• Music notation fonts bundled with VexFlow: Bravura and Petaluma by Steinberg (SIL Open Font License 1.1), Academico and Gonville — see VexFlow's repository for their licenses

Icons

Phosphor Icons — MIT License.

Open-source software

The app runs on open-source packages such as React, Next.js, Tone.js and VexFlow. Every package shipped with the app, with its license and license text, is listed in third-party-notices.txt.