void slider_valueChangedSink(VolumeSliderControl _volumeSliderControl, uint _newValue)
{
RotaryButton.Value = Slider.Value;
this.volumeValueChanged();
}
void slider_muteStateChangedSink(VolumeSliderControl _volumeSliderControl, bool _newValue)
{
if (muteStateChanged != null) muteStateChanged(this, _newValue);
}