beets keeps a persistent index of all your music, and manages it as a whole library. It has a bunch of plugins, including a web-based music player, and provides

beets keeps a persistent index of all your music, and manages it as a whole library. It has a bunch of plugins, including a web-based music player, and provides a rich Python API if you want to extend it yourself. You can use beets as a CLI replacement to Picard, but beets offers a lot more to the hacker.