can play sound through the projector's speaker system if your video
source has audio output ports. Connect the
projector to the video source using a stereo mini-jack adapter
cable (with one 3.5 mm mini-plug and two RCA plugs).
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.