No audio when invoking StartPreview() or StartRecording()

AUDIO/VIDEO CAPTURE (StartPreview / StartRecording):
By default the audio is disabled.
– to enable the audio rendering, set:
VideoGrabber.AudioDeviceRendering = true
– to enable the audio recording, set:
VideoGrabber.AudioRecording = true
PLAYER (OpenPlayer):
By default VideoGrabber.PlayerAudioRendering is enabled.