HomeViewModel recognition

HomeViewModel.swift

public func startRecognition() {
  feedback.prepare()
  
  // 1
  do {
    if engine.isRunning {
      stopRecognition()
      return
    }
    
    // 2
    try prepareAudioRecording()
    
    generateSignature()
    
    try startAudioRecording()
    
    feedback.notificationOccurred(.success)
  } catch {
    // Handle errors here
    print(error)
    feedback.notificationOccurred(.error)
  }
}

public func stopRecognition() {
  isRecognizingSong = false
  engine.stop()
  engine.inputNode.removeTap(onBus: .zero)
}