private void buttonON4_Click(object sender, RoutedEventArgs e)
 {
     soundControllers.ElementAt(3).On = !soundControllers.ElementAt(3).On;
     Update();
     VCE?.Invoke(this, new VolChangedArgs {
     });
 }
 private void Slider4_ValueChanged(object sender, RoutedPropertyChangedEventArgs <double> e)
 {
     if (Slider4.Value > 0)
     {
         soundControllers.ElementAt(3).Mute = false;
     }
     else
     {
         soundControllers.ElementAt(3).Mute = true;
     }
     SetVolume();
     VCE?.Invoke(this, new VolChangedArgs {
     });
     Update();
 }
 private void Slider3_ValueChanged(object sender, RoutedPropertyChangedEventArgs <double> e)
 {
     if (!MainChange)
     {
         if (Slider3.Value > 0)
         {
             soundControllers.ElementAt(2).Mute = false;
         }
         else
         {
             soundControllers.ElementAt(2).Mute = true;
         }
         //MainWindow.Monitors.ElementAt(2).Volume = (int)Slider3.Value;
         SetVolume();
         VCE?.Invoke(this, new VolChangedArgs {
         });
         Update();
     }
 }