Open-source licenses
Effective October 5, 2026
EarPitch is built on open-source software. Thank you to these projects.
pitchy
Used for measuring the pitch of your voice (the McLeod pitch method).
License: MIT. © 2018-2021 Ian Johnson.
Recursive
Used for the typeface (self-hosted with the site; a static cut is used for link-preview images).
License: SIL Open Font License 1.1. © The Recursive Project Authors.
Next.js and React
Used for the website.
License: MIT. © Vercel, Inc.; © Meta Platforms, Inc. and affiliates.
Drizzle ORM
Used for the database layer.
License: Apache-2.0. © Drizzle Team.
All test tones are synthesized in your browser; no recorded instrument samples are used.