Sony STR-ZA810ES Manual page 143

Select [Automatic Phase Matching].
2
Select the setting you want.
3
Auto: Switches the A.P.M. function on or off automatically.
Off
Note
This function does not work in the following cases:
Headphones are connected.
[Auto Calibration] has not been performed.
[Bluetooth Mode] is set to [Transmitter].
[DSD Native] is set to [On] and DSD signals are being played back.
[Pure Direct] is set to [On].
The receiver may play signals at a lower sampling frequency than the actual sampling frequency of
the input signals, depending on the audio format.
[154] Adjusting Settings
Selecting the Auto Calibration type (Calibration Type)
You can select a calibration type after you have performed the Auto Calibration and saved the
settings.
Select [Setup] - [Speaker Settings] from the home menu.
1
Select [Calibration Type].
2
Select the setting you want.
3
Full Flat: Makes the measurement of frequency from each speaker flat.
Engineer: Sets to "the Sony listening room standard" frequency characteristics.
Front Reference: Adjusts the characteristics of all of the speakers to match the
characteristics of the front speaker.
Off
Note
This function does not work in the following cases:
Headphones are connected.
[Auto Calibration] has not been performed.
[Bluetooth Mode] is set to [Transmitter].
[DSD Native] is set to [On] and DSD signals are being played back.
[Pure Direct] is set to [On].
The receiver may play signals at a lower sampling frequency than the actual sampling frequency of
the input signals, depending on the audio format.
Speaker Settings