People who want to screen movies or videos using a projector should have a separate audio system on hand. A modern home audio system, when connected properly, can reproduce the surround sound experience of a movie theater.
Some all-in-one home theater systems can supply audio as well as video, though these systems may sound tinny compared with a full-range audio system. Film buffs who want to duplicate the movie-house experience generally run the audio signal directly to an audio receiver and speaker setup.
Audio systems typically include several different audio options. Standard red and white RCA cables can send stereo or multichannel sound to a receiver, but each channel requires its own separate RCA cable. A digital optical or coax audio cable can handle multi-channel signals. DVI and HDMI cables carry both audio and video.
If an audio issue occurs with a projected video, users should make sure the audio receiver has power and check the audio connectors for a good connection. They should also check the receiver settings to make sure they have enabled multi-channel sound functions.
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