OK. ODL 32651H-TB Mode D'emploi page 37

To terminate this operation and control the TV via
the remote again, press Quick Menu button on the
remote, highlight the CEC RC Passthrough and
set as Off by pressing Left or Right button. This
feature can also be enabled or disabled under the
System>Settings>More menu.
The TV supports also ARC(Audio Return Channel)
feature. This feature is an audio link meant to replace
other cables between the TV and the audio system
(A/V receiver or speaker system).
When ARC is active, TV does not mute its other audio
outputs automatically. So you need to decrease TV
volume to zero manually, if you want to hear audio from
connected audio device only (same as other optical or
co-axial digital audio outputs). If you want to change
connected device's volume level, you should select
that device from the source list. In that case volume
control keys are directed to connected audio device.
Note: ARC is supported only via the HDMI1 input.
System Audio Control
Allows an Audio Amplifier/Receiver to be used with
the TV. The volume can be controlled using the
remote control of the TV. To activate this feature set
the Speakers option in the System>Settings>More
menu as Amplifier. The TV speakers will be muted
and the sound of the watched source will be provided
from the connected sound system.
Note: The audio device should support System Audio Control
feature and CEC option should be set as Enabled.
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