SWIFT: Passing Data from one class to another - swift

Question

So I have been using prepareForSegue to pass data from one variable to another class. It all works fine when the variable I am passing data to is with the destinationViewController. But what happens when it's not?
Example: I am taking moving from ViewController1 to ViewController2 but I want the data from ViewController1 to go to a "non ViewController" class even though I still want the segue to VC2 to happen.
Any ideas? Thank you!
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if (segue.identifier == "stopRecording") {
//let playSoundsVC:PlaySoundsViewController = segue.destinationViewController as! PlaySoundsViewController
let audioEffectsClass = AudioEffect()
let data = sender as! RecordedAudio
audioEffectsClass.receivedAudio = data
}
}
import Foundation
import AVFoundation
class AudioEffect {
let session = AVAudioSession.sharedInstance()
var audioEngine: AVAudioEngine!
var audioPlayerNode: AVAudioPlayerNode!
var audioFile: AVAudioFile!
var receivedAudio: RecordedAudio!
var changeEffect = AVAudioUnitTimePitch()
func create(){
//output is through speakers
do{
try session.overrideOutputAudioPort(AVAudioSessionPortOverride.Speaker)
} catch {print("Failed output audio through speakers.")}
audioEngine = AVAudioEngine()
audioPlayerNode = AVAudioPlayerNode()
audioEngine.attachNode(audioPlayerNode)
}
func playAudio(){
audioEngine.stop()
audioEngine.reset()
do {
audioFile = try AVAudioFile(forReading: receivedAudio.filePathUrl)
} catch {print("Failed to create file.")}
audioPlayerNode.scheduleFile(audioFile, atTime: nil, completionHandler: nil)
do {
try audioEngine.start()
} catch {}
audioPlayerNode.play()
audioEngine.attachNode(changeEffect)
audioEngine.connect(audioPlayerNode, to: changeEffect, format: nil)
audioEngine.connect(changeEffect, to: audioEngine.outputNode, format: nil)
}
func playAudioWithVariablePitch(pitch:Float) {
changeEffect.pitch = pitch
create()
playAudio()
}
func playAudioWithVariableRate(rate: Float){
changeEffect.rate = rate
create()
playAudio()
}
func stopAudio(){
audioEngine.stop()
}
}

Answer 1

If you have a variable referencing the class, make a method to receive the data in that class and call the method and pass the data in prepareForSegue.

Answer 2

Well I hope I understand you right... But if I understand you right I don´t know what should be the problem?!? If you pass data to a subclassed UIViewcontroller class, or to any other class, its just the same?!? :-)
What error do you get? Or what happens if you run your code posted?
Maybe this helps you?
class VCOne: UIViewController {
lazy var audioEffect: AudioEffect = AudioEffect()
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if (segue.identifier == "stopRecording") {
if let recordedAudio: RecordedAudio = sender as? RecordedAudio {
audioEffect.receivedAudio = recordedAudio
}
}
}
}
class AudioEffect {
var receivedAudio: RecordedAudio?
}