LG CineBeam PU700R Owner's Manual page 110

[Use Wired Speaker]
(Q. Settings) →
[HDMI(ARC) Device]
Sound from the projector can be output through an external audio device connected via
a HDMI (ARC) port.
• Select [HDMI(ARC) Device] to automatically turn on SIMPLINK. Once SIMPLINK
is turned off, the output speaker settings automatically revert to the default
settings for uninterrupted audio output.
• The configurable items differ depending upon model.
→ [Sound] → [Sound Out] → [Use Wired Speaker]
63