function sync(countDownTime, songDuration) {
    var timeRemaining = computeTimeRemaining(countDownTime, songDuration);

    syncGlobal(timeRemaining);
    syncPlaylist(timeRemaining);
    syncSong(timeRemaining);
    syncSongInPlaylist(timeRemaining);
  }
Syncs all of the countdown time elements.

@param {object} countDownTime - The current time of the audio.
@param {object} songDuration - The song duration of the audio.