function syncGlobal(seconds) {
    var durationSecondSelectors = document.querySelectorAll(".amplitude-duration-seconds");

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

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

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