Personally I don't like depending on musicbrainz or other online sources; any album that enters my collection I manually (and tediously...) tag via information found on discogs and other sources. I get that this is not... a typical desire, but, for anyone else who came across this post and thought "cool! I like music tagging!", other things worth mentioning are the really useful `eyeD3` utility [1] and `exfalso` [2] (which is from the same the `quodlibet` media player project, which I have found handles large libraries very well!).

Maybe someday I will relax my meticulousness enough to use online sources for automatic tagging... :)

[1] https://eyed3.readthedocs.io/en/latest/ [2] https://quodlibet.readthedocs.io/en/latest/guide/commands/ex...