Originally Posted by blazzer_19
so how does shielding work then??
One of the more surprising factoids is that at audio frequencies and line levels, shielding often does not do a heck of a lot. It is primarily an advantage at high frequencies (e.g. above the audio band), with high impedance circuits (generally not used in audio) and/or very low level signals (e.g. the output of a microphone or turntable pick-up).
Some high end audiophiles even favor cables with no shielding or the shielding disconnected. Usually, no shielding does not hurt audio.
Why do different colours affect buzz differently??
You've got some kind of grounding problem that is mixing some tiny bit of the video signal back into the audio. It might have not been the colors as such, but rather the changes in intensity that goes with changes in color, that was causing changes to the video signal that sound differently. The actual color in a regular coax video signal is not a big component of the signal.
and next.... why was there no buzz at all when I connect the cable with dvd player?
The source of the noise in your audio was a grounding problem. DVD players usually have 2 conductor power plugs and are not grounded to your power wiring.
There was no buzz with dvd so why with satellite?
Satellite video cable is grounded for safety reasons. Its basically an outdoor antenna and therefore a good ground to deal with lightening and the like are a good idea.
I feel there has to be a reason and a way to improve as opposed to ripping out drywall. Arnyk comes across as having a better more technical understanding.
Well thanks for the encourgement. I have advanced formal education, I've worked in many different technical areas within electronics for decades, and my experiences are highly varied. I've done electronics for years while wearing both blue and white collars. ;-)
Besides, I've had this very problem and fixed it, and not fixed it in many circumstances. Obviously, when the solution I suggested to you didn't work, the cause was that the problem was something else. Because of my technical training and the test equipment I'm fortunate enough to have, I've looked at many of these problems from a number of different directions.