Lidarr

Lidarr is a music collection manager for people who download through Usenet or BitTorrent. It keeps watch on RSS feeds for new releases from the artists you follow, then grabs the tracks, sorts them into a library and renames them according to your naming rules. Its interface and workflow follow the style of Sonarr, but for music.

It can scan an existing library and fetch missing tracks, and it can watch for higher-quality versions of music you already own and upgrade them automatically. If a download fails it tries another release, and a manual search lets you pick a specific release or see why one was skipped. It handles special editions and multi-album releases, and file renaming is fully configurable.

Lidarr integrates with SABnzbd and NZBGet for downloading, and with Kodi and Plex for notifications, library updates and metadata. It runs on Windows, Linux, macOS and Raspberry Pi, is written in C#, and is licensed under GPL-3.0.