Open Opus Wiki

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Welcome to the Open Opus Wiki

This is the official documentation hub for all Open Opus projects - the Open Opus database and the players Concertmaster and Concertino.

Open Opus

Open Opus is a free, open database for classical music metadata. It was created as a backend for the players Concertmaster and Concertino. But it can be used in any classical music application. The data is completely open for anyone not only to use but to edit as well - it's a wiki-style free-to-edit database. Open Opus' software is also open sourced and everybody is invited to contribute with code or fork it.


Concertmaster screen

Concertmaster and Concertino are open source classical music front-ends for Spotify and Apple Music, respectively. They consume Open Opus data and combine them with automated analysis of the Spotify/Apple Music own metadata in order to create an adequate user experience for classical music. It relies on crowdsourced curation as well for additional verification and refinement.


Open Opus, Concertmaster and Concertino are free to use but they run on web servers that cost us money. You can help us by supporting us on Patreon - any amount is more than welcome! $5 supporters get early access to new versions and an exclusive online board to talk about future features.