can play sound through the projector's speaker system if your video
source has audio output ports.
If you are projecting video using the
Computer or BNC ports, connect the projector to the video
source using an optional stereo 3.5 mm mini-jack audio
Note: If you
connected your video source to the projector using an HDMI cable,
the audio signal is transferred with the video signal; you do not
need an additional cable for sound.