FYI, the Metropolitan Opera International Radio Network began 15 kHz stereo distribution to 14 cities via AT&T in 1973 using Siemens equipment that substituted one stereo pair for a telco "group" (12 phone calls).
TTFN, Mark John Shutt wrote:
----- Original Message ----- From: "Manfredi, Albert E" <albert.e.manfredi@xxxxxxxxxx>While local TV had decent sound even back in the 1960s, basically the same as FM radio but much less dynamic range (due to the 50 KHz bandwidth of TV audio), Network TV shows sounded no better than AM radio. Then suddenly, around 1976 or 1977, I noticed almost overnight that all network TV shows sounded identical to the local transmissions. Audio bandwidth out to around 15 KHz or so.Goodbye AT&T land lines for network distribution, hello to satellite delivered programming.---------------------------------------------------------------------- You can UNSUBSCRIBE from the OpenDTV list in two ways:- Using the UNSUBSCRIBE command in your user configuration settings at FreeLists.org - By sending a message to: opendtv-request@xxxxxxxxxxxxx with the word unsubscribe in the subject line.
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