BenQ LW855UST - Playing Sound through the Projector

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Connection
Playing sound through the projector
You can make use of the projector speaker in your presentations, and also connect separate
amplied speakers to the AUDIO OUT socket of the projector.
If you have a separate sound system, you will most likely want to connect the audio output of your
Video source device to that sound system, instead of to the audio projector.
Once connected, the audio can be controlled by the projector On-Screen Display (OSD) menus.
The table below describes the connection methods for different devices, and where the sound is
from.
Device Computer/PC HDMI
Audio input port AUDIO IN (mini jack) HDMI
The projector can play the
sound from...
AUDIO IN (mini jack) HDMI
Audio output port AUDIO OUT AUDIO OUT
The selected input signal determines which sound will be played by the projector speaker, and
which sound will be output from the projector when AUDIO OUT is connected. If you select
the COMPUTER/PC signal, the projector can play the sound received from AUDIO IN mini
jack.