How to get LCD tv audio to work with surround sound?
February 21st, 2010 | 
Author: admin
Author: admin
jamieadams_rocks asked:
I have a RCA 32″ Class LCD HDTV w/ Digital Tuner, L32HD31 that I got this past Christmas, and just recently purchased a panasonic Surround sound with the 1 hdmi port and the htdv cmpt ports and a regular red white and yellow port for video out, and audio in, because it is also a dvd player.
Now how can i get my tv audio to play on the surround sound? (cant buy hdmi cable)
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Use either fiber, or digital coax.. from your TV to your reciever for the best sound
The TV outputs Stereo Sound only, not 5.1. You need a 5.1 source, like the HDMI, Optical or Coaxial output of a DVD player, or the output of a DirecTV or cable box to send 5.1 to your receiver.
You could connect the White and Red RCA TV sound outputs to your surround system, but you will only get stereo sound.
You can just run the RCA audio cables to the input of the surround receiver. The various surround channels are all multiplexed onto the right and left audio channels, such that you can hook it up to a two-channel stereo for right and left sound, or you can hook it up to a 5.1 surround receiver for surround sound.
Basically, the right and left front channels are in stereo. So, they have different signals on each channel. The center channel is then applied to both the right and left channels. The decoder logic simply picks off what is on both the right and left channels and sends this to the center channel. In fact, even if you didn’t have a center channel speaker, you would still get the center channel effect, because the center channel would come through both the right and left speakers, giving the illusion that it’s coming from the center.
The rear channels are a bit more complicated. The right rear channel is applied to both the right and left main inputs, but they are 180 degrees out-of-phase to each other. The left rear channel is also applied to both the right and left main inputs 180 degrees out-of-phase to each other. So, when the rear signals are applied to the speakers with the front right, left, and center channels, they cancel each other out and cannot be heard.
In the mean time, the logic circuit in the surround-sound decoder receives both the right and left audio channels, and shifts them each 90 degrees relative to one another. So, the surround signals are now in phase again. With this shift, the right, left, and center signals are now all 180 degrees out-of-phase with each other to the rear speakers. So, they cancel each other out and you can’t hear those channels out of the rear speakers.
Here is the answer to all of your problems!