Use a batch tag editor, there are tons around. It's not really the remit of a music player to get too deeply into heavyweight file editing (if indeed a player even supports it at all, most don't) any more that it's a photo editor's task to play music just because you are editing an album cover. I use TagScanner on my PC for this sort of task, but there are others - MP3TAG for example. There are even phone apps that can do it, although it really is a very much easier task on a decent sized s