GTK+ editor for audio file tags

 EasyTAG is an utility for viewing, editing and writing
 the tags of different audio files, using a GTK+ interface.
 .
 Currently EasyTAG supports the following:
  - View, edit, write tags of MP3, MP2 files (ID3 tag), FLAC files (FLAC Vorbis
    tag), Ogg Opus, Ogg Speex and Ogg Vorbis files (Ogg Vorbis tag),
    MP4/M4A/AAC files (MPEG-4 Part 10 tag), and MusePack, Monkey's Audio files
    (APE tag);
  - Auto tagging: parse file and directory names using masks to automatically
    fill in tag fields;
  - Cover art support for all formats;
  - Rename files from the tag fields (using masks) or by loading a text file;
  - Process selected files of the selected directory;
  - Ability to browse subdirectories;
  - Recursion for tagging, removing, renaming, saving, etc;
  - Can set a field (artist, title, ...) on all other selected files;
  - Read file header information (bitrate, time, ...) and display it;
  - Undo and redo last changes;
  - Ability to process tag fields and file names (convert letters into
    uppercase, lowercase, etc);
  - Ability to open a directory or a file with an external program;
  - CDDB support (from http protocol);
  - A tree based browser;
  - A list to select files;
  - A playlist generator window;
  - A file searching window;
  - Simple and explicit interface.