[QuadList] Two Inch Quad Stereo Recording--NBC Burbank--PCM Audio at NBC-NY

[Ted Langdell]

On Aug 21, 2014, at 11:01 AM, David Crosthwait via QuadList wrote:

> When NBC Burbank went stereo throughout the plant via the new Master Grid NEC router, stereo was handled via L+R and L-R per New York directive. It was determined to be a mess and was abandoned around 1983.
> 
> David


A picture of NEC's router and mention of the use in Burbank is mentioned on the inside front cover of this Broadcast Engineering issue:
http://www.americanradiohistory.com/Archive-Broadcast-Engineering/BE/70s/BE-1979-05.pdf


David, 

Were tapes recorded with this "sum/difference" audio?  I would imagine that would make for a fun time when one of these is encountered in an archive.

The April/May 1976 issue of RCA Engineer has a comprehensive package of articles on NBC NY's facilities for switching, transmission and machine control:
http://www.americanradiohistory.com/Archive-RCA-Engineer/1976-04-05.pdf

On Page 42, there's an article about how Pulse Code Modulation was used to put four audio channels into the video for routing within the NY facilities. What happens at VTRs is described.  There were 44 VTRs and cart machines in NY at the time.

See next post about what else is in the BE issue.

Cheers,

Ted

Ted Langdell
Secretary
Quad Videotape Group
e-mail:	ted at quadvideotapegroup.com


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