[QuadList] QuadList Digest, Vol 60, Issue 11

[TQ]

> On 21 June 2013 at 17:52 Dennis Degan <dennyd1 at verizon.net> wrote:

> > I had to smile at the reference to "network sound" since we heard
> > the same thing in Ohio. I once wrote to CBS about it and was told
> > that the audio coming out of New York at the time was immediately
> > truncated at 7500 hz (or cycles back then) before going thru any
> > land lines. The highs were further cut to 5k or less by the time
> > they reached any stations. I was thrilled the day our chief engineer
> > told me we would soon be switching to satellite delivery.
>
>            I offer:
>
>    That may have been true at the time Brigadoon was fed to stations,
>but starting in 1977, AT&T was in the process of replacing all video
>terminal equipment with a multiplex baseband system that not only
>provided stations with high fidelity audio, it was capable of feeding
>stereo audio to stations as well.  Before baseband multiplexing, TV
>audio was sent SEPARATELY on 5k phone lines.  This old method of
>transmission had a number of disadvantages.
>    Multiplexing provided high-quality (50-15k Hz) low-noise audio with
>stereo as an option and guaranteed video-to-audio synchronization. 
>This was because the audio travelled the same path with the video.  It
>didn't last because networks changed over to satellite distribution in
>the early '80's, making AT&T's microwave/coaxial cable distribution
>obsolete.

Was this done with SiS?

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