Four Daily Mix playlists in your Plex library, rebuilt every morning.

Like Spotify's Daily Mixes, except built from the music you already own and running entirely on your own server.

They appear as ordinary playlists in Plex and Plexamp, with cover art. Mix 1 is always the energetic one, so you learn the numbers once — but the songs are different every day, and a track won't come back to the same mix for two weeks.

Roughly half of each playlist is music you actually listen to, and half is music you own but have forgotten about.

• Plex Pass. Cadence relies on Plex's sonic analysis, which is a Plex Pass feature. Before starting, go to your music library in Plex and run Settings → Library → Analyze. Without it Cadence will refuse to start and tell you so.
• A machine that can run Docker, on the same network as your Plex server.

Make a docker-compose.yml:

services:
  cadence:
    build: .
    restart: unless-stopped
    environment:
      PLEX_URL: http://192.168.1.100:32400
      PLEX_TOKEN: your-plex-token
      # The library name exactly as it appears in Plex's sidebar
      PLEX_MUSIC_LIBRARY: Music
      # Your timezone, so the 4am rebuild happens at 4am your time
      TZ: America/Chicago
    ports:
      - "8973:8973"
    volumes:
      - cache:/app/.cache
      # Prefer a folder on your disk? Swap the line above for the two below,
      # using your own `id -u` and `id -g`. The named volume needs neither.
      # - /path/on/your/disk:/app/.cache
    # user: "1000:1000"
    stop_grace_period: 30s

volumes:
  cache:

Start it:

docker compose up -d
docker compose logs -f

The first start takes about five minutes. Cadence asks Plex about every track in your library once, to learn which songs sound alike, and remembers the answer. After that a rebuild takes under a minute. Watch the logs and you'll see it finish, then four new playlists appear in Plex.

That's everything. It rebuilds them at 4am each day and otherwise stays out of the way. curl localhost:8973/status says when it last ran, when it runs next, and how each playlist turned out.

Open Plex in a browser, click any song, choose Get Info, then View XML. Look at the URL of the page that opens: it contains X-Plex-Token= followed by a long string. That string is your token.

Everything is optional except the two Plex values. Add any of these to environment: in your compose file.

• How the playlists are built
• Development

MIT