How to Play Audio in Swift

var filePath = NSBundle.mainBundle().pathForResource("movie_quote", ofType: "mp3"){

            var filePathUrl = NSURL.fileURLWithPath(filePath)

            audioPlayer = AVAudioPlayer(contentsOfURL: filePathUrl, error: nil)

            audioPlayer.enableRate=true

with this code

1 

File -> add new file -> select audio file -> move to "supporting files " on Navigator.

the file is located to "movie_quote" 

2, 

    @IBAction func FastButton(sender: UIButton) {

        audioPlayer.stop()

        audioPlayer.rate = 2.0

        audioPlayer.play()

Action on User Interface Button with above code.
rate  enable to change the pitch.

today's Udacity's lecture.