Jasper Mangel: Optical audio is the way to go. The red and white will not give you 5.1.
Armanda Hertel: my tv doesnt have an optical audio output thats why im trying to connected from my cable HD box to my Home theater system and my home theater system does support 5.1 dolby sound.
Marcel Then: you at the instant are not likely to word any distinction in sound high quality. Your television speaker at the instant are not the suited audio equipment in any respect to start with. HDMI cable can carry as much as 7.one million audio sign, collectively as the optical in basic terms a 5.one million. wish this could assist you out.
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Angel Klym: Connect the optical cable directly from the Comcast receiver to the optical input on the home theater amp. That will give you 5.1 surround sound. The red/white RCA cables will give you only a stereo or a simulated 4-channel surround sound.The fact that your ca! ble box is HD is irrelevant as far as the audio is concerned. 5.1 audio encoding can be present with HD as well as SD video.FWIW, I've used the 2 RCA cables with my home theater system for years, and the 4-channel effect is pretty good. But optical is the way to go if you can do it. Again, directly from the cable box to the amp, not through the TV....Show more
Dick Ovdenk: If your Home Theater Receiver can decode Dolby 5.1 Surround Sound, then you might hear an improvement. Optical will support 5.1 where the red / white will only do stereo. Also, you can't get hum with an optical cable where you can with copper cables (not saying you have hum now, though).
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