LG CineBeam AU810PW Owner's Manual page 114

[Sound Out]
The configurable items differ depending upon model.
•
When [Instant Game Response] is set to [On], audio delays may occur if you set
[Sound Out] to [Bluetooth]/[HDMI ARC].
Switch to [Internal Projector Speaker] or change
[Sound] [Additional Settings]
Playing audio through the projector's internal speakers
(Q. Settings)
Audio is played through the projector' s internal speakers.
[HDMI Input Audio Format] to [PCM].
[Sound] [Sound Out]
(Q. Settings)
[Internal Projector Speaker]
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