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Re: [ARSCLIST] Stereo records.
There were AM-FM stereo broadcasts of live music as early as 1958 in New York and Washington, DC.
Matthew Barton
MBRS
The Library of Congress
101 Independence Ave., SE
Washington, DC 20540-4610
202-707-5508
email: mbarton@xxxxxxx
>>> Mark4@xxxxxxxxxxxxxxx 6/15/2006 11:13:15 PM >>>
We did that a lot in the late 50's. We worked with a drive-in theater
(remember them?) in St Cloud Minnesota. Played 1/4-inch 1/4-track stereo
tapes and then the newly-released LPs before the movie. FM fed the movie
speaker system and moviegoers tuned their car radios to the AM channel.
We did AM-AM stereo as well; that generally provided the best stereo
tracking. AM-FM worked okay since early on, phasing wasn't important (and
would have been impossible given the highly different AM and FM
characteristics).
No matter the mis-matched media, the "ping-pong" stereo sounded great; in or
out of phase...
And then it was on to FM-Quad in 1970. What fun!
Mark Durenberger
----- Original Message -----
From: "steven c" <stevenc@xxxxxxxxxxxxxx>
To: <ARSCLIST@xxxxxxxxxxxxxxxx>
Sent: Thursday, June 15, 2006 6:36 PM
Subject: Re: [ARSCLIST] Stereo records.
> ----- Original Message -----
> From: "Michael Shoshani" <mshoshani@xxxxxxxxxxxxx>
>> On Thursday 15 June 2006 14.14, steven c wrote:
>>
>> > At a guess, I'd say radio...in particular, FM radio, which was stereo
> from
>> > (when?).
>>
>> In theory, from the very beginning, although in practice from probably
> 1960,
>> give or take three years. Armstrong gave an FM multiplexing
>> demonstration
> in
>> 1933 or 34 that mixed a signal from NBC Red Network, one from NBC Blue
>> Network, a facsimile front page of The New York Times, and one other
>> thing
> I
>> can't recall offhand - all on the same carrier wave.
>>
> Well, I can recall an early "stereo experiment" that involved a sort-of-
> local station that had both AM and FM operations...and broadcast one
> channel on each for a half-hour program...
>
> Steven C. Barr
>
>