Attributions

Répertoire links out to sheet music hosted on the International Music Score Library Project (IMSLP) / Petrucci Music Library. We do not host, copy, or redistribute IMSLP's scanned scores ourselves — we link directly to the relevant IMSLP page so you can view or download the score there, subject to IMSLP's own terms of use and the copyright status of each edition in your jurisdiction. Piece metadata we display (title, composer, opus/catalogue number, key, and similar factual details) is drawn from public, factual information about these works and is not IMSLP's copyrighted content. "IMSLP" and the Petrucci Music Library name and logo belong to their respective owners; Répertoire is not affiliated with, endorsed by, or sponsored by IMSLP.

Répertoire displays a 1–9 difficulty rating for each piece using the same numeric scale popularized by G. Henle Verlag's published "Levels of Difficulty" classification for their Urtext editions. To be clear about what this is:

• These ratings are independently estimated by Répertoire using AI models and editorial review — they are not licensed from, provided by, or verified against a Henle database or API. G. Henle Verlag does not offer a public dataset or API for their ratings.
• For well-known works that G. Henle Verlag has published and publicly rated on their own site, we aim for our estimate to match their published rating, but we cannot guarantee exact agreement, and the majority of pieces in our catalogue are not published by Henle at all, so no official rating exists for them to begin with.
• "Henle" and "G. Henle Verlag" are trademarks of G. Henle Verlag. Répertoire is not affiliated with, endorsed by, or sponsored by G. Henle Verlag; we reference the name only to describe the difficulty scale our estimates follow.

Where available, we embed or link to publicly available performance videos hosted on YouTube so you can hear a piece before learning it. These videos remain the property of their original creators and/or rightsholders, and are subject to YouTube's own terms. Répertoire does not download, re-host, or modify this video content. The YouTube logo and trademarks belong to Google LLC; Répertoire is not affiliated with, endorsed by, or sponsored by YouTube or Google.

Répertoire is built with the following open-source libraries, each used under the terms of its own license:

Each library's full license text is available at the linked repository. This list covers the libraries with a user-visible role in the app; it is not an exhaustive dependency manifest.

The Service's typeface is Inter by Rasmus Andersson, served via Google Fonts and licensed under the SIL Open Font License 1.1. Interface icons are from Lucide, an open-source icon set (ISC License) derived from Feather Icons.

Répertoire is hosted on Vercel and uses Google Firebase for authentication and data storage, and the Google Gemini API to generate AI explanations, as described in our Privacy Policy. "Vercel," "Google," "Firebase," "Gemini," and "YouTube" are trademarks of their respective owners. Use of these services and names does not imply any endorsement of Répertoire by those companies.

The Répertoire name, logo, and interface design are owned by LHK Space. All other product names, logos, and brands referenced on this page or elsewhere on the Service are the property of their respective owners and are used for identification purposes only, under nominative fair use, and do not imply any affiliation or endorsement unless explicitly stated.

If you are a rightsholder and believe content on Répertoire is misattributed, missing an attribution it requires, or should be removed, please contact us at support@repertoire.app and we will review and address it promptly.