In a nutshell, I have comment data in a few thousand songs that I need to be able to mass-retrieve and mass-move. Winamp wrote its ID3 v2.2 comment data to the *last* comment field (the standard supports an arbitrary number of comments, each labeled with a name); those comments need to be copied/overwritten to a *blank* (unnamed) comment field so that my other mp3 players can see them.
So I need an id3 tagger -- on windows or Mac; preferably Mac but either should work -- that supports batch processing of multiple comment fields and the ability to move arbitrary (or multiple) id3 comments into a blank comment. Or, if I may repeat myself, a program specifically designed to clean up after Winamp's mistakes.
I can't find either. Any recommendations?
(n.b. most of the mp3s in question also have id3 v1.1 tags and I potentially could pull the data from there. But I would need a program that supports batch copy of *just* the comment tag from v1 to v2. If I batch copy the entire v1 tag to v2, I lose long song/album/artist names.)