Audio is not working.

Hi, I am trying to incoporate audio into an app that I'm making and I use the simulator to test but the second it gets on it goes back to the project screen with a line highlighted and a thread error below it saying

Thread 1:EXC_BAD_INSTRUCTION(code=EXC_I386_INVOP,subcode=0x0)

and another error in the debug area saying

fatal error: unexpectedly found nil while unwrapping an Optional value  (lldb)

The code i am using is this

/
  ViewController.swift
  ***********************
  Created by Marco Simonelli on 26/04/2015.
  Copyright (c) 2015 Antonio Enterprises. All rights reserved.
*/
import UIKit
import AVFoundation
class ViewController: UIViewController {
   
   
    var  ButtonAudioURL = NSURL(fileURLWithPath: NSBundle.mainBundle().pathForResource("TURDY BIRD BACKGROUND T1 copy", ofType: "wav")!)
   
    var ButtonAudioPlayer = AVAudioPlayer()
   
    override func viewDidLoad() {
        super.viewDidLoad()
        /
       
       ButtonAudioPlayer = AVAudioPlayer(contentsOfURL: ButtonAudioURL, error: nil)
    }
   
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        /
    }
   
    @IBAction func PlayButton1(sender: AnyObject) {
    }
}

line 20 is where i get the thread error.

please help me.

Thanks in advance.

🙂🙂🙂

P.S.

i am not sure if i was meant to add in a library or emmbedded binarys in it beause i have not.