I don't want to be the captain of the obvious, but it took me a few days to figure out how to do it. The TV set made friends with the home theater as follows: I connected an optical cable, I took an inexpensive belkin (it makes no sense to take more than a thousand / two), I connected HDMI, it doesn’t matter which one at all, I pressed the home button, connected the microphone and started auto-tuning. Without this, the cinema played back in TV mode via optics, but it was not possible to adjust the sound, turn it on and off with the TV. And it turned out because there are no wires in optics, it is essentially a hollow tube that transmits light, and HDMI acts here only as a wire for transmitting an electrical signal.
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