public void Stop()
 {
     state = RecorderState1.Idling1;
     frame_index_ = 0.0f;
 }
 public void Play()
 {
     state = RecorderState1.Playing1;
 }
 public void Record()
 {
     state = RecorderState1.Recording1;
 }
 public void Pause()
 {
     state = RecorderState1.Idling1;
 }