I am profoundly confused. The more I read the docs, the more confused I get.
I have a bash script that assigns the tags I need including replay gain. All I want picard to do is to add the five MusicBrainz tags without overwriting anything else. Can I do this? If so, kindly tell me how.
Another way would be to install and use the plugin called KEEP TAGS:
This plugin let you choose what tags you want to keep (= delete all not wanted tags).
For example, if you want to keep only the title, artist, album and tracknumbers in your files, then the command would be: $keep(title,artist,album,tracknumber)