 
 class ViewController: UIViewController {
 
+    let SeekTimeStep = 10.0
+    
     var timer: NSTimer?
     
     var audioPlayer: AudioPlayer?

        playing = !playing
    }
    
    @objc func fire(sender: AnyObject) {
        
        updateMediaSlider(currentTime: _currentTime)
    }

            playButton.selected = playing
            if (playing) {
                audioPlayer?.play()
                timer = NSTimer.scheduledTimerWithTimeInterval(0.3, target: self, selector: "updateViews:", userInfo: nil, repeats: true)
            }
            else {
                audioPlayer?.pause()
