protected override void ProcessRecord()
{
MMDeviceEnumerator DevEnum = new MMDeviceEnumerator();
MMDeviceCollection devices = DevEnum.EnumerateAudioEndPoints(EDataFlow.eRender, EDeviceState.DEVICE_STATE_ACTIVE);
MMDevice defaultDevice = DevEnum.GetDefaultAudioEndpoint(EDataFlow.eRender, ERole.eMultimedia);
WriteObject(string.Format("{0}%", defaultDevice.AudioEndpointVolume.MasterVolumeLevelScalar * 100));
}