I asked about this three years ago when I was trying to do it with XSPF formatted playlists (which can support this), but that standard does not seem to be fully implemented in MB. With the new MB 3.4 I was hoping this capability would be available, but I still cannot find a way.
Here is what I want to do - Import a playlist from another system and then have MB match the Artist/Album/Track to my library.
It is a relatively simple matter to manually open the imported playlist, select a track and manually locate it in the current library, even if the track is stored in a different format (e.g. playlist originally referenced .mp3 file, but manually matching it with a .flac file updates the imported playlist). Although this is a simple process, it is obviously tedious for hundreds or thousands of tracks.
So is there anyway to automate that re-linking of the playlist track to the current library? I tried using the "Send To File Rescan" function, which sounded promising, but did not work (maybe because the extensions did not match?).