I am creating a SpriteKit Game with background music looping. The problem is that the music is too loud. How do I lower the volume?
Here is the code I used to set up the music
var backGroundMusic = AVAudioPlayer()
var bgMusicUrl:NSURL = NSBundle.mainBundle().URLForResource("BackGround", withExtension: "wav")
backGroundMusic = AVAudioPlayer(contentsOfURL:bgMusicUrl, error: nil)
backGroundMusic.numberOfLoops = (-1)
backGroundMusic.prepareToPlay()
backGroundMusic.play()