public mp4Device(WirelessMusicDeviceInterface device)
 {
     this.device       = device;
     this.playingMusic = false;
     this.bluetooth    = true;
     connect();
 }
 public void switchSpeaker(WirelessMusicDeviceInterface device) /////////
 {
     if (device.GetType() != this.device.GetType())
     {
         playingMusic = false;
         this.device  = device;
         Console.WriteLine("Device changed!");
         connect();
     }
 }