audio tag editor for GTK+

 Ex Falso displays and edits audio metadata tags. Supported formats include
 MP3, Ogg Vorbis, FLAC, Musepack (MPC), WavPack, and MOD/XM/IT.
 .
 A command-line counterpart, Operon, is also distributed as part of this
 package.
 .
 Notable features include:
  * Freeform tag editing for most supported formats, including ID3v2
  * Multiple values for tag keys
  * Flexible rename-by-tags and tag-by-filename patterns
  * Extensible using simple Python-based plugins
  * Edit multiple files in several formats at once