skip.js

$('.progress-bar').click(function(e) {
  var playingSound = soundManager.getSoundById(_.keys(soundManager.sounds)[0]),
   x               = e.pageX - $(this).offset().left,
   width           = $(this).width(),
   duration        = playingSound.durationEstimate;

  playingSound.setPosition((x / width) * duration);
});