"The Edge of Night" did air from the east side 76th Street studio.
At the time I joined the SFX department in 1975, Edge was broadcast
live from that location. Sid Bean was the SFX guy for the show at
Wikipedia has this to say:
"The Edge of Night (also known as Edge of Night) is a long-running
American television mystery series/soap opera produced by Procter &
Gamble. It debuted on CBS on April 2, 1956, and ran on that network
until November 28, 1975; the series then moved to ABC, where it aired
from December 1, 1975, until December 28, 1984. There were 7,420
episodes, with some 1,800 available for syndication."
Sid went on vacation during the interval when the show was preparing
to move to ABC. So, they started videotaping the shows, doing two
shows one day, and one show the next. It took about a month for them
to get two weeks worth of shows in the can, which is what they needed
to make the move.
And Jim is quite correct that -this- was not the studio that he
designed. Most of the theater was in it's original condition. The
SFX "booth" was simply an area up in a mezzanine or balcony that had
been "walled off" with heavy curtains to provide some sort of sound
isolation. The SFX console was a vacuum tube design with plug-in
modules, that had three variable speed turntables and four tone arms,
plus an outboard McKenzie cartridge tape player, and a single
outboard LP turntable. When Jim's design debuted, there was a real
room for SFX, with a newly designed SFX console, with three variable
speed turntables, each with two tone arms and a DJ style cross-fader
on each. The audio path also had a 12 input Neve solid state mixer,
and eight audio cart machines, including two that were record-playback.
ATWT eventually returned to the BC, and the east side studio was
closed. In January 2000, the show moved to it's current Brooklyn