I am creating a basic soundboard app. I have two switches. One that when activated will make the audio slower and lower pitch and one that makes it faster and higher. I have an if else if if statement that looks at those switches and then plays the audio accordingly, however when I try to push it a second time, either for the same sound or a different sound, it crashes.
I'm about 99% sure that this is due to the AVAudioEngine needing to be reset or having the nodes themselves reset, but I am way past being out of my league here. I've searched high and low, but the answer I seem to be finding relate to resetting the player when using different buttons to make the high or low sounds. Any thoughts?
class ViewController: UIViewController {
@IBOutlet weak var sassSwitch: UISwitch!
@IBOutlet weak var chipSwitch: UISwitch!
@IBAction func sassAction(_ sender: UISwitch) {
chipSwitch.setOn(false, animated: true)
}
@IBAction func chipSwitch(_ sender: UISwitch) {
sassSwitch.setOn(false, animated: true)
}
///Playback Engine
private let audioEngine = AVAudioEngine()
///Player's Nodes
private let pitchPlayer = AVAudioPlayerNode()
private let timePitch = AVAudioUnitTimePitch()
///Audio Files to be played
private var audioFile1 = AVAudioFile()
private var audioFile2 = AVAudioFile()
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
if let filePath = Bundle.main.path(forResource: "PeteNope", ofType:
"mp3") {
let filePathURL = URL(fileURLWithPath: filePath)
setPlayerFile(filePathURL)
}
if let filePath2 = Bundle.main.path(forResource: "Law_WOW", ofType:
"mp3") {
let filePath2URL = URL(fileURLWithPath: filePath2)
setPlayerFile2(filePath2URL)
}
}
private func setPlayerFile(_ fileURL: URL) {
do {
let file = try AVAudioFile(forReading: fileURL)
self.audioFile1 = file
} catch {
fatalError("Could not create AVAudioFile instance. error: \(error).")
}
}
private func setPlayerFile2(_ fileURL: URL) {
do {
let file = try AVAudioFile(forReading: fileURL)
self.audioFile2 = file
} catch {
fatalError("Could not create AVAudioFile instance. error: \(error).")
}
}
@IBAction func sound1Play(_ sender: UIButton) {
if sassSwitch.isOn {
timePitch.pitch = -300
timePitch.rate = 0.5
audioEngine.attach(pitchPlayer)
audioEngine.attach(timePitch)
audioEngine.connect(pitchPlayer, to: timePitch, format: audioFile1.processingFormat)
audioEngine.connect(timePitch, to: audioEngine.outputNode, format: audioFile1.processingFormat)
pitchPlayer.scheduleFile(audioFile1, at: nil, completionHandler: nil)
// Start the engine.
do {
try audioEngine.start()
} catch {
fatalError("Could not start engine. error: \(error).")
}
pitchPlayer.play()
} else if chipSwitch.isOn {
timePitch.pitch = +500
timePitch.rate = 2.0
audioEngine.attach(pitchPlayer)
audioEngine.attach(timePitch)
audioEngine.connect(pitchPlayer, to: timePitch, format: audioFile1.processingFormat)
audioEngine.connect(timePitch, to: audioEngine.outputNode, format: audioFile1.processingFormat)
pitchPlayer.scheduleFile(audioFile1, at: nil, completionHandler: nil)
// Start the engine.
do {
try audioEngine.start()
} catch {
fatalError("Could not start engine. error: \(error).")
}
pitchPlayer.play()
} else {
timePitch.pitch = +0
timePitch.rate = 1.0
audioEngine.attach(pitchPlayer)
audioEngine.attach(timePitch)
audioEngine.connect(pitchPlayer, to: timePitch, format: audioFile1.processingFormat)
audioEngine.connect(timePitch, to: audioEngine.outputNode, format: audioFile1.processingFormat)
pitchPlayer.scheduleFile(audioFile1, at: nil, completionHandler: nil)
// Start the engine.
do {
try audioEngine.start()
} catch {
fatalError("Could not start engine. error: \(error).")
}
pitchPlayer.play()
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
