Beets

It catalogs a music collection and continuously refines its metadata by querying MusicBrainz and other sources. The core system can import files, match them to existing records, and rewrite tags, album art, lyrics, genres, tempos, ReplayGain values, and acoustic fingerprints. A command‑line interface and a web UI let users browse, play via HTML5 audio, and edit the library, while plugins extend functionality to fetch data from Discogs or Beatport, transcode audio, detect duplicates, and fill missing tracks.

The tool is aimed at users who want a programmable, self‑hosted solution for organizing large music libraries without relying on subscription services. Its extensibility through Python plugins makes it suitable for developers and hobbyists who need custom metadata handling or integration with other workflows.

Distributed under the MIT license, the software is stable, open‑source, and can be installed via pip or system package repositories, providing a command‑line driven workflow and an optional web interface for graphical interaction.