function syncGlobal(minutes) {
    var durationMinuteSelectors = document.querySelectorAll(".amplitude-duration-minutes");

    for (var i = 0; i < durationMinuteSelectors.length; i++) {
      var playlist = durationMinuteSelectors[i].getAttribute("data-amplitude-playlist");
      var songIndex = durationMinuteSelectors[i].getAttribute("data-amplitude-song-index");

      if (playlist == null && songIndex == null) {
        durationMinuteSelectors[i].innerHTML = minutes;
      }
    }
  }
Syncs the global duration minutes elements.

@param {Integer} minutes - the duration minutes for the audio.