demo.html

<script src="../dist/web_audio_player.min.js"></script>
<script>
  var player = new WebAudioPlayer();
  var currentTrack;

  // Equalizer wave similar to the WinAmp's 'Rock' preset.
  var eqPreset = [4.76, 3.617, 0, -3.375, -3, 0, 4.76, 5.9, 5.9, 5.52];

  // Audio by Jack Strait.
  // http://www.flashkit.com/loops/Easy_Listening/Easy_Listening/after-the-rain-150527192016.html
  var files = ['https://dl.dropboxusercontent.com/s/gmu0htaucqrn95t/after_the_rain.mp3?dl=1'];

  player.setEq(eqPreset);

  currentTrack = player.createTrack(files);
  currentTrack.load()
    .then(function (track) {
      track.play();
    })
    .catch(function (error) {
      console.log(error);
    });

  currentTrack.addEventListener('finished', function () {
    console.log('finished on:', this.getDuration(), 's');
  });

  currentTrack.when(5.5, function () {
    console.log('played 5.5s (to be exact:', this.getPlayedTime(), 's)');
  });
</script>