Here’s comes the cool app of the day – Audio Tag Tool.
If you ever stumbled upon having issues with capitalization of id3 tags,
needed to do filename conversion or changing the genre of an album, you may not
have been completely happy with what Rhythmbox or Banshee provides.
This little gtk+ app will provide a lot of this corner case functionality with
a not-so-crackrock interface.
Packaged in debian as tagtool.