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 or
MHL cable, the audio signal is transferred with the video
signal; you do not need an additional cable for sound.