var OVERLAP = 2500;
  var RECENTLY_PLAYED_NODES_LENGTH = 21;
  var recentlyPlayedNodes = [];
  var audioDurationFix = function(audio) {
    if ($(audio).attr('id') === 'ive-13') {
      return 3.0;
    }
    return audio.duration;
  }
  
  var randomNode = function() {
    var newNode = $('#ive-'+(1+Math.floor(Math.random()*$('audio').length)))[0];
    if (recentlyPlayedNodes.indexOf(newNode) === -1) {
      recentlyPlayedNodes.push(newNode);
      if (recentlyPlayedNodes.length > RECENTLY_PLAYED_NODES_LENGTH) {
        recentlyPlayedNodes.shift();
      }
      return newNode;
    } else {
      return randomNode();
    }
  }
  
  var playNext = function() {
    var audioNode = randomNode();
    $(audioNode).on('timeupdate', function() {
      if (audioNode.currentTime * 1000 > audioDurationFix(audioNode) * 1000 - OVERLAP) {
        $(audioNode).off('timeupdate');
        playNext();
      }
    });
    audioNode.play();
  }
  
  playNext();