function playSongAtIndex(index) {
    /*
    Stop the current song.
    */
    _core2.default.stop();

    /*
    Determine if there is a new playlist, if so set the active playlist and change the song.
    */
    if (_checks2.default.newPlaylist(null)) {
      _audioNavigation2.default.setActivePlaylist(null);

      _audioNavigation2.default.changeSong(_config2.default.songs[index], index);
    }

    /*
    Check if the song is new. If so, change the song.
    */
    if (_checks2.default.newSong(null, index)) {
      _audioNavigation2.default.changeSong(_config2.default.songs[index], index);
    }

    /*
    Play the song
    */
    _core2.default.play();

    /*
    Sync all of the play pause buttons.
    */
    _playPauseElements2.default.sync();
  }
Plays a song at the index passed in from the songs array.

Public Accessor: Amplitude.playSongAtIndex( index )

@access public
@param {number} index 	- The number representing the song in the songs array.