- Gray Audograph
The Gray Audograph was a
dictationformat introduced in 1945. It recorded sound by pressing grooves into soft vinyldiscs, like the competing, but incompatible, SoundScriber. It was manufactured by the Gray Manufacturing Company of Hartford, Connecticut, in the United States.
The Audograph recorded on thin vinyl discs, recording from the inside to the outside, the opposite of conventional
gramophone records. Unlike conventional records, the disc was driven by a surface-mounted wheel. This meant that its recording and playback speed decreased toward the edge of the disc (like the Compact Discand other digital formats), to keep a more constant linear velocity and to improve playing time. [ [http://www.78rpmrecord.com/centerst.htm The 78rpm Home Page - Center-Start 78s ] ]
Along with a
DictaBeltsound recorder, an Audograph captured sounds recorded at the time of the John F. Kennedy assassinationthat were reviewed by the United States House Select Committee on Assassinations.
In 1950, Gray began to make a variant of the Audograph for
AT&T, known as the Peatrophone; however, due to what at the time were the high costs of renting and installing the machine, it served only a niche market. [ [http://www.recording-history.org/HTML/answer_biz8.php History of The Dictation Equipment Industry ] ]
* [http://www.std.org/russ/GrayAudograph.html Restoring Gray Audograph recordings]
* [http://www.recording-history.org/HTML/dicta_biz5.php Image of Audograph catalog]
* [http://stormbugblog.blogspot.com/2005/11/earwitness.html The Audograph and the Kennedy assassination]
Wikimedia Foundation. 2010.
Look at other dictionaries:
Dictabelt — The Dictabelt or Memobelt was a form of recording medium introduced by the American Dictaphone company in 1947. It used a type of Write Once Read Many medium consisting of a thin, plastic belt 3.5 wide that was placed on a cylinder and spun … Wikipedia
Dictabelt evidence relating to the assassination of John F. Kennedy — John F. Kennedy The Dictabelt evidence relating to the assassination of John F. Kennedy comes from a Dictabelt recording from a microphone stuck in the open position on a motorcycle police officer s radio when John F. Kennedy, 35th President of… … Wikipedia
Unusual types of gramophone records — The overwhelming majority of records manufactured have been of certain sizes (7, 10, or 12 inches), playback speeds (33⅓, 45, or 78 RPM), and appearance (round black discs). However, since the commercial adoption of the gramophone record, a… … Wikipedia
Dictation machine — Transcribing dictation with a Dictaphone wax cylinder dictation machine, in the early 1920s. Note supply of extra wax cylinders on lower part of stand. A dictation machine is a sound recording device most commonly used to record speech for later… … Wikipedia
Gramophone record — A 12 inch (30 cm) 33⅓ rpm record (left), a 7 inch 45 rpm record (right), and a CD (above) A gramophone record, commonly known as a phonograph record (in American English), vinyl record (in reference to vinyl, the material most commonly used after … Wikipedia
John F. Kennedy assassination — The assassination of John F. Kennedy, the thirty fifth President of the United States, took place on Friday, November 22, 1963, in Dallas, Texas, USA at 12:30 p.m. CST (18:30 UTC). John F. Kennedy was fatally wounded by gunshots while riding with … Wikipedia
Compact Disc — CD redirects here. For other uses, see CD (disambiguation). Not to be confused with DVD. Compact disc The readable surface of a Compact Disc incl … Wikipedia
Phonograph — Turntable redirects here. For other uses, see Turntable (disambiguation). Edison cylinder phonograph ca. 1899 … Wikipedia
MiniDisc — This article is about the Sony storage format. For the Gescom album, see Minidisc (album). For the IBM minidisk, see VM (operating system). MiniDisc … Wikipedia
Compact Cassette — A TDK D C60 cassette, a common speech quality tape with a 60 minute playing time, in a housing similar to that of the original Compact Cassette specification … Wikipedia