It would be great if Picard could provide new mappings for artist and release comments. For id3, something like "COMM:artist" or "COMM:artist_description" could be used, for other tagging systems something new must be found (e.g. "artistcomment").

The use case is, I sometimes have releases with the same name (single/lp, reissue, different language version with same title, etc.), and sometimes even artists with the same name. I want to implement a feature in my favorite audio player, that it displays the artist/release comment if there is a name clash (but not in other cases!).

I'm marking the ticket as "decision required", because it has to be decided what tags to use.