My audio is still playing when another image source is selected. What should I do?
Because there is only one set of audio RCA jacks (red/white) on the projector, composite video, S-Video, and Computer/Component sources share the same audio jacks. You will need to connect the audio cables to your desired video source. See Playing Sound Through the Projector.
If you're connecting your audio equipment using the HDMI port and your audio equipment is HDMI 1.2 or newer, the audio is carried through the HDMI cable.