private void OnSelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            if (sender is ComboBox c && c.SelectedItem is Device d)
            {
                Properties.Settings.Default.AudioPlayerDevice = d.DeviceId;
                Properties.Settings.Default.Save();

                if (output == null)
                {
                    output = new OutputSource(d);
                }
                else
                {
                    output.SwapDevice(d);
                }
            }
        }