How do I turn the microphone on or off on the BN68 Smart TV?
You can turn the microphone on or off using the switch located at the bottom of the TV. When the microphone is turned off, all voice and sound features that rely on the microphone will not be available. Note that the position and shape of the microphone switch may differ depending on the model. (Page 10)
From the official Samsung Bn68 Smart TV manual, page 10
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