Epson PowerLite EB-810E User Manual page 224

Setting
A/V Output
Inverse Audio
Options
While Projecting
Always On
On
Off
224
Description
Determines when the projector outputs
audio and images to external devices; set
to Always On to output audio and images
when the projector is in standby mode
This setting is only displayed when Quick
Startup is set to Off in the projector's
Operation menu, Auto Power On is set to
Off in the projector's Network menu, or
Auto Power On is set to HDMI1 and
Power On Trigger is set to Plug-in
Detection in the projector's Operation
menu.
Set to On to invert the audio's left and right
channels to match the projector installation
position.