Sony STR-DN1080 Manual page 155

Set the height from the floor to the ceiling. You can make the [In-Ceiling Speaker Mode] function
and Dolby Atmos enabled speakers work better by configuring this setting and performing Auto
Calibration.
Select [Setup] - [Speaker Settings] from the home menu.
1
Select [Ceiling Height].
2
Adjust the height.
3
Note
This function does not work in the following cases:
Headphones are connected.
[Bluetooth Mode] is set to [Transmitter].
[171] Adjusting Settings
Selecting the unit of measurement (Distance Unit)
You can select the unit of measurement for setting distances.
Select [Setup] - [Speaker Settings] from the home menu.
1
Select [Distance Unit].
2
Select the setting you want.
3
feet: The distance is displayed in feet.
meter: The distance is displayed in meters.
[172] Adjusting Settings
Playing audio signals with high-quality sound (Digital
Legato Linear (D.L.L.))
The D.L.L. function is Sony proprietary technology that allows low-quality digital and analog
audio signals to be played with high-quality sound.
Select [Setup] - [Audio Settings] from the home menu.
1
Speaker Settings
Audio Settings