public DgMic()
{
MMDeviceEnumerator enumerator = new MMDeviceEnumerator();
_devices = enumerator.EnumerateAudioEndpoints(EDataFlow.ECapture,
EDeviceState.DeviceStateActive);
_count = _devices.Count;
for (int i = 0; i < _count; i++)
{
_devices[i].AudioEndpointVolume.OnVolumeNotification += AudioEndpointVolume_OnVolumeNotification;
}
}