segue - SWIFT: Passing Data from one class to another -

so have been using prepareforsegue pass data 1 variable class. works fine when variable passing data destinationviewcontroller. happens when it's not?

example: taking moving viewcontroller1 viewcontroller2 want data viewcontroller1 go "non viewcontroller" class though still want segue vc2 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 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()     {         audiofile = try avaudiofile(forreading: receivedaudio.filepathurl)     } catch {print("failed create file.")}      audioplayernode.schedulefile(audiofile, attime: nil, completionhandler: nil)     {         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() } 

}

if have variable referencing class, make method receive data in class , call method , pass data in prepareforsegue.