Sony BRAVIA Theatre Bar 9 Help Manual page 46

Depending on the combination of the sound field setting(*) and content, the [Sound Field Optimization](**) effect may not be
applied.
The sense of presence that can be achieved by the surround sound processing may vary depending on the playback content.
When playing multi-channel audio, check the digital audio output setting on the device that is connected to the speaker system.
For details, refer to the operating instructions supplied with the connected device.
Some speakers may not output sound depending on the content or sound field setting(*).
The night mode automatically turns off when the speaker system is turned off.
Check the URL below for TVs that are compatible with the linkage function of the speaker system.
https://www.sony.net/hav_faq
Depending on the TV setting or content, the voice zoom may not work.
*
On/off setting of the sound field and the setting displayed after you tap [Settings] - [Sound Settings] - [Sound Field Setting] on the remote control screen on
the app.
** Displayed when you tap [Settings] - [Sound Settings] - [Sound Field Optimization] on the remote control screen on the app.
Related Topic
[Sound Settings]
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