Credits & open-source licenses

Open-source and soundfont attribution.

Audio

Audio is generated with MuseScore Studio, © Muse Group, under the GNU General Public License v3.

Instrument sounds come from the soundfonts MS Basic (MuseScore_General) and MuseScore_General HQ (MuseScore_General_Full): © Frank Wen (2000–2008), Michael Cowgill (2014–2017), S. Christian Collins (2018–2019), Ethan Winer (2002), Michael Schorsch (2016). Licensed under the MIT License.

Live playback in the browser uses FluidSynth (GNU Lesser General Public License v2.1) via js-synthesizer (BSD-3-Clause).

The premium Symphony sound is rendered with Virtual Playing Orchestra (© Paul Battersby) — built from Sonatina Symphonic Orchestra (Creative Commons Sampling Plus 1.0), Versilian VSCO 2 CE (CC0) and No Budget Orchestra — via sfizz (BSD-2-Clause). Audio rendered with the Symphony sound may not be used for advertising or promotional purposes (see the Terms, § 5).

The AI singing voice is synthesized with SoulX-Singer (Apache License 2.0); voice timbres come from the Kyutai Unmute voice-donation set (CC0, recorded with the donors' consent).

Melody transcription: ROSVOT (MIT) for sung recordings, and Spotify's Basic Pitch with TensorFlow.js (Apache License 2.0) for in-browser audio-to-notes.

Engraving

LilyPond, licensed under the GNU General Public License v3.

The live view is rendered with Verovio (RISM Digital Center), licensed under the GNU Lesser General Public License v3.

AI

Powered by Claude (Anthropic). Ariolos is not affiliated with, endorsed or sponsored by Anthropic. “Claude” is a trademark of Anthropic, PBC.

Ariolos ist nicht mit Anthropic verbunden und wird von Anthropic weder unterstützt noch gesponsert. „Claude“ ist eine Marke von Anthropic, PBC.

Frontend

React, React Router, React-PDF, react-markdown, remark-gfm (MIT). PDF.js and the Liberation fonts (Mozilla Foundation, Apache License 2.0).

Typefaces: Instrument Serif (© The Instrument Serif Project Authors), Hanken Grotesk (© The Hanken Grotesk Project Authors) and Geist Mono (© The Geist Project Authors / Vercel) — each under the SIL Open Font License 1.1.

Backend

FastAPI, Uvicorn, Pydantic, httpx, aiosqlite, argon2-cffi, mutagen, slowapi and the Anthropic SDK (MIT / BSD / Apache 2.0). Error reporting via the Sentry SDK to our self-hosted GlitchTip.