Can I search for missing tags with Musicbrainz Picard or some other application? My music folder is ~80 GB and I want the application to show me all missing tags (and hopefully fix them by retrieving tag data from freedb or amazon.com).
Try EASY TAG
It’s a great tool for editing most ID3 tags (both version 1 and 2) on all popular music filetypes.
It automatically taggs music using CDDB and renaming the files themselves and directories they are in
More information can be found here (including reviews):
Directly install from here: Easytag
Also you can use Kid3:
With Kid3, an audio tag editor you can: