Scripter

SongKong Scripter allows us to use Javascript to modify metadata fields to new values based on other fields. Because we use the Javascript this gives access to a huge number of functions giving more power and flexibility than simple scripting languages included as part of other tag editors. SongKong comes with a number of default scripts that can be used for common tasks or as part of a larger script.

MusicBrainz and Discogs

Not only can we use existing metadata fields, we can also have script fields that represent the linked MusicBrainz or Disocgs release and the filename giving us full control