function syncPlaylist(hours) {
    /*
    Get all of the hour selectors
    */
    var currentHourPlaylistSelectors = document.querySelectorAll('.amplitude-current-hours[data-amplitude-playlist="' + _config2.default.active_playlist + '"]');

    /*
    Set the current hour selector's inner html to hours passed in.
    */
    for (var i = 0; i < currentHourPlaylistSelectors.length; i++) {
      var songIndex = currentHourPlaylistSelectors[i].getAttribute("data-amplitude-song-index");

      /*
        Updates the current hour selector for a global display.
      */
      if (songIndex == null) {
        currentHourPlaylistSelectors[i].innerHTML = hours;
      }
    }
  }
Syncs the playlist current hour elements.

@param {Integer} hour - The current audio hour.