mp3_info (MusicBrainz::Client)

    /*
     * Calculate the crucial pieces of information for an MP3 file.
     *
     * Note: This method returns the duration of the MP3 in milliseconds, so
     * you'll need to divide the duration by 1000 before passing it to
     * MusicBrainz::TRM methods.
     *
     * Aliases:
     *   MusicBrainz::Client#get_mp3_info
     *
     * Examples:
     *   # get the duration and stereo of an MP3 named 'foo.mp3'
     *   info = mb.mp3_info 'foo.mp3'
     *   puts 'duration (ms): ' << info['duration'] << ', ' <<
     *        'stereo: ' << (info['stereo'] ? 'yes' : 'no')
     *
     */
    static VALUE mb_client_mp3_info(VALUE self, VALUE path) {