ID3 tagging

Hello,
Here is an easy solution to this question.
We could use the "id3tool". It is a command line program with many options to edit audio tags.
 $ sudo apt-get install id3tool

 $ id3tool --help

 id3tool [<options>] <filename>
  -t, --set-title=WORD Sets the title to WORD
  -a, --set-album=WORD Sets the album to WORD
  -r, --set-artist=WORD Sets the artist to WORD
  -y, --set-year=YEAR Sets the year to YEAR [4 digits]
  -n, --set-note=WORD Sets the note to WORD
  -g, --set-genre=INT Sets the genre code to INT
  -G, --set-genre-word=WORD Sets the genre to WORD
  -c, --set-track=INT Sets the track number to INT
  -l, --genre-list Shows the Genre's and their codes
  -v, --version Displays the version
  -h, --help Displays this message

The src/utility.c module has couple of functions that can spawn (run) the id3tool command with arguments, like
GPid exec_command_async(gchar **argv, GError **error);
and
gboolean run_simple_command(gchar *cmd, gchar *args);

gchar *find_command_path(gchar *command);
This function can be used to find the "id3tool" command itself. Audio-recorder would not reports errors if the "id3tool" isis missing. Thought, there should be a some kind of message of this in the [Settings] dialog.