I've been working on a new suite of tools for music managment. I've you've used beets.io or Picard, you get the idea. They are great tools but for me were not fast enough and hard to grasp. wrtag is fast enough that the filesystem can be the source of truth, so no need for a sidecar database which can get out of sync
it also includes a web interface to manage imports from external sources.
Hope you like it