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From then until about 1975, when Dolby Stereo was used for the first time in films, most motion pictures – even some from which stereophonic soundtrack albums were made, such as Zeffirelli's Romeo and Juliet – were still released in monaural sound, [22] stereo being reserved almost exclusively for expensive musicals such as West Side Story ...
Harvey Fletcher (September 11, 1884 – July 23, 1981) was an American physicist. [1] Known as the "father of stereophonic sound", he is credited with the invention of the 2-A audiometer [2] and an early electronic hearing aid.
Ring-and-spring microphones, such as this Western Electric microphone, were common during the electrical age of sound recording c. 1925–45.. The second wave of sound recording history was ushered in by the introduction of Western Electric's integrated system of electrical microphones, electronic signal amplifiers and electromechanical recorders, which was adopted by major US record labels in ...
The experiments with stereo during the 1930s and 1940s were hampered by problems with synchronization. A major breakthrough in practical stereo sound was made by Bell Laboratories, who in 1937 demonstrated a practical system of two-channel stereo, using dual optical sound tracks on film. [28]
A little over 10 years ago, David Adjmi was on an airplane, listening to Led Zeppelin’s “Babe I’m Gonna Leave You,” and picturing Robert Plant recording the vocals. “It’s communicating ...
A Quadraphonic 8-Track Cartridge Analog, 1 ⁄ 4 inch wide tape, 3 + 3 ⁄ 4 in/s, 4-channel stereo, endless-loop cartridge 1971 Quadraphonic Vinyl Record (CD-4) (SQ Matrix) An SQ quadraphonic record Analog, introduced by CBS Records for matrix and RCA / JVC for CD-4 Recorded two tracks on both stereo channels, requiring a decoder to hear all ...
The Smithsonian Institution holds the Underwood & Underwood Glass Stereophonic Collection that includes some 28,000 glass plates, including stereoscopic negatives, negative and positive non-stereoscopic plates used to produce lantern slides and paper prints, paper stereographs, sales catalogues and 4 stereoscopes.
Ampex 601 playing a recording of "Les Paul's New Sound, Vol. II". Made in Redwood City, California, c. 1956. Internals of Ampex Fine Line F-44, a 3-head Ampex home-use audio tape recorder, c. 1965 AMPEX model 300 half-inch three-track recorder AMPEX 440 (2tr, 4tr) & 16-track MM 1000