Sony SRS-NS7 Help Manual page 56

While TV audio is playing in spatial sound, no audio comes out from the TV. The volume control feature of the TV remote control
is disabled as well.
While the headphones are connected with the transmitter, operations with the headphones, such as pausing the current playback
content or skipping to the next playback content, are not available.
Related Topic
Connecting the transmitter and a TV
Terminating audio output in spatial sound (After use)
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