in reply to slightly OT - How can I calculate the length of an MP3 file

Searching CPAN for MP3 reveals a number of candidates.

For example: 

  use MP3::Info;

  my $mp3 = MP3::Info->new( $my_file_name );
  print $mp3->time, $mp3->title;

[download]

In Section Seekers of Perl Wisdom