Quote Originally Posted by InvisibleMonkey View Post
Question to anyone who's done it: I know flac-taggers exist but any recommendations for command line tools to edit tags (Windows preferably)? (I'm still thinking about creating a meta-data database of info, then using scripts to update tags where necessary.)
The official Windows FLAC download includes metaflac.exe, which lets you add tags at the command line.

It's been a while since I've used it, but I believe that by default tags are added rather than modified. So a change to an existing tag will require deletion of that tag followed by re-adding.