Information about Gray Audograph
The Gray Audograph was a dictation format introduced in 1945. It recorded sound by pressing grooves into soft vinyl discs, 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 Disc and other digital formats), to keep a more constant linear velocity and to improve playing time.[1]
Along with a DictaBelt sound recorder, an Audograph captured sounds recorded at the time of the John F. Kennedy assassination that 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.[2]
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 Disc and other digital formats), to keep a more constant linear velocity and to improve playing time.[1]
Along with a DictaBelt sound recorder, an Audograph captured sounds recorded at the time of the John F. Kennedy assassination that 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.[2]
References
External links
- Restoring Gray Audograph recordings
- Image of Audograph catalog
- The Audograph and the Kennedy assassination
Audio format | |
|---|---|
| Analog |
Phonograph cylinder (1877) •
Gramophone record (1895) •
Wire recording (1898) •
Reel-to-reel tape (1940s) •
SoundScriber (1945) •
Gray Audograph (1945) •
Dictabelt (1947) •
Microgroove record (1948) •
RCA tape cartridge (1958) •
Fidelipac (1959) •
Stereo-Pak (1962) •
Compact Cassette (1963) and cassette single (1982) •
Stereo 8 (1964) •
PlayTape (1966) •
Mini Cassette (1967) •
Microcassette (1969) •
Steno-Cassette (1971) •
Elcaset (1976) •
Picocassette (1985)
|
| Digital |
Soundstream (1976) •
3M (1979) •
X80/ProDigi (1980) •
DASH (1982) •
Compact Disc (1982) •
Digital Audio Tape (1987) •
ADAT (1991) •
MiniDisc (1991) •
Digital Compact Cassette (1992) •
Extended Resolution Compact Disc (1995) •
High Definition Compatible Digital (1995) •
5.1 Music Disc (1997) •
Super Audio CD (1999) •
DVD-Audio (2000)
|
Dictation can refer to:
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- Dictation (exercise), when one person speaks while another person transcribes what is spoken.
- A dictation machine, a device used to record this speech for transcription.
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A vinyl compound is any organic compound that contains a vinyl group (also called ethenyl), −CH=CH2. These are derivatives of ethylene, CH2=CH2, with one hydrogen atom substituted with some other group.
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The SoundScriber was a dictation format introduced in 1945. It recorded sound by pressing grooves into soft vinyl discs, and, along with the competing Gray Audograph and DictaBelt, is one of the few examples of a groove-based recording medium.
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Hartford, Connecticut
Hartford's downtown seen from across the Connecticut River
Flag
Seal
Nickname: The Insurance Capital of the World
Location in Hartford County, Connecticut
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Hartford's downtown seen from across the Connecticut River
Flag
Seal
Nickname: The Insurance Capital of the World
Location in Hartford County, Connecticut
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Motto
"In God We Trust" (since 1956)
"E Pluribus Unum" ("From Many, One"; Latin, traditional)
Anthem
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"In God We Trust" (since 1956)
"E Pluribus Unum" ("From Many, One"; Latin, traditional)
Anthem
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gramophone record (also phonograph record, or simply record) is an analogue sound storage medium consisting of a flat disc with an inscribed modulated spiral groove starting near the periphery and ending near the center of the disc.
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Compact Disc
The closely spaced tracks on the readable surface of a Compact Disc cause light to diffract into a full visible colour spectrum
Media type: Optical disc
Encoding: Various
Capacity: Typically up to 700 MB
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The closely spaced tracks on the readable surface of a Compact Disc cause light to diffract into a full visible colour spectrum
Media type: Optical disc
Encoding: Various
Capacity: Typically up to 700 MB
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The Dictabelt was a form of recording medium introduced by the American Dictaphone company in 1947. It used a stylus to record sounds by pressing a groove into a plastic belt. Previously, Dictaphone's products had used wax cylinders as their recording medium.
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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.
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The United States House of Representatives Select Committee on Assassinations was established in 1976 to investigate the John F. Kennedy assassination and the Dr. Martin Luther King, Jr. assassination.
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AT&T Inc.
Public (NYSE: T )
Founded 1983[1]
Headquarters San Antonio, Texas, USA
Key people Randall L. Stephenson, Chairman/CEO; Richard Lindner, CFO
Industry Telecommunications
Products Wireless, Telephone, Internet, Television
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Public (NYSE: T )
Founded 1983[1]
Headquarters San Antonio, Texas, USA
Key people Randall L. Stephenson, Chairman/CEO; Richard Lindner, CFO
Industry Telecommunications
Products Wireless, Telephone, Internet, Television
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An audio format is a medium for storing sound and music. The term is applied to both the physical recording media and the recording formats of the audio content – in computer science it is often limited to the audio file format, but its wider use usually refers to the
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phonograph cylinders. Commonly known simply as "records" in their era of greatest popularity (c. 1888–1915), these cylinder shaped objects had an audio recording engraved on the outside surface which could be reproduced when the cylinder was played on a mechanical phonograph.
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gramophone record (also phonograph record, or simply record) is an analogue sound storage medium consisting of a flat disc with an inscribed modulated spiral groove starting near the periphery and ending near the center of the disc.
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Wire recording is a type of analogue audio storage in which the recording is made onto thin steel or stainless steel wire.
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History
The first wire recorder was the Valdemar Poulsen Telegraphone of the late 1890s, and wire recorders for law/office dictation and telephone..... Click the link for more information.
Reel-to-reel, open reel tape recording is the form of magnetic tape audio recording in which the recording medium is held on a reel, rather than being securely contained within a cassette.
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The SoundScriber was a dictation format introduced in 1945. It recorded sound by pressing grooves into soft vinyl discs, and, along with the competing Gray Audograph and DictaBelt, is one of the few examples of a groove-based recording medium.
..... Click the link for more information.
..... Click the link for more information.
The Dictabelt was a form of recording medium introduced by the American Dictaphone company in 1947. It used a stylus to record sounds by pressing a groove into a plastic belt. Previously, Dictaphone's products had used wax cylinders as their recording medium.
..... Click the link for more information.
..... Click the link for more information.
gramophone record (also phonograph record, or simply record) is an analogue sound storage medium consisting of a flat disc with an inscribed modulated spiral groove starting near the periphery and ending near the center of the disc.
..... Click the link for more information.
..... Click the link for more information.
RCA Victor tape cartridge
Media type: Magnetic tape cartridge
Encoding: Analog
Capacity: 30 min per side, two sided
Developed by: RCA
Dimensions: 5 x 7 1/8 x 1/2 inches
(127 x 197 x 13 mm)
Usage: Home audio recording
Extended from: 1958
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Media type: Magnetic tape cartridge
Encoding: Analog
Capacity: 30 min per side, two sided
Developed by: RCA
Dimensions: 5 x 7 1/8 x 1/2 inches
(127 x 197 x 13 mm)
Usage: Home audio recording
Extended from: 1958
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Fidelipac is the official name of the industry standard audio tape cartridge used for radio broadcasting for playback of material over the air such as commercials, jingles, station IDs, and music.
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Stereo-Pak
Media type: magnetic tape
Encoding: analog signal
Read mechanism: tape head
Write mechanism: magnetic recording head
Developed by: Muntz
Usage: Car audio playback
The Muntz Stereo-Pak, commonly known as the 4-track cartridge
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Media type: magnetic tape
Encoding: analog signal
Read mechanism: tape head
Write mechanism: magnetic recording head
Developed by: Muntz
Usage: Car audio playback
The Muntz Stereo-Pak, commonly known as the 4-track cartridge
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Compact Cassette
Typical 60-minute Compact Cassette
Media type: magnetic tape
Encoding: analog signal
Capacity: 23 minutes per side (C46)
30 minutes per side (C60)
45 minutes per side (C90)
50 minutes per side (C100)
60 minutes per side (C120)
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Typical 60-minute Compact Cassette
Media type: magnetic tape
Encoding: analog signal
Capacity: 23 minutes per side (C46)
30 minutes per side (C60)
45 minutes per side (C90)
50 minutes per side (C100)
60 minutes per side (C120)
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Cassette single
Two U.S. cassette singles and their cardboard slipcases: Donald Fagen's "Century's End" (1988) and the Rolling Stones' "Mixed Emotions" (1989)
Media type: magnetic tape
Encoding: analog signal
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Two U.S. cassette singles and their cardboard slipcases: Donald Fagen's "Century's End" (1988) and the Rolling Stones' "Mixed Emotions" (1989)
Media type: magnetic tape
Encoding: analog signal
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Stereo 8
An 8-track cartridge of Never Mind the Bollocks, Here's the Sex Pistols
Media type: magnetic tape
Encoding: analog signal
Capacity: Four pairs of stereo channels
Read mechanism: tape head
Write mechanism: magnetic recording head
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An 8-track cartridge of Never Mind the Bollocks, Here's the Sex Pistols
Media type: magnetic tape
Encoding: analog signal
Capacity: Four pairs of stereo channels
Read mechanism: tape head
Write mechanism: magnetic recording head
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Playtape was an audiotape format and playback system introduced in 1966 by Frank Stanton. It was a two-track system, and was launched to compete with existing 4-track cartridge technology. The tapes played anywhere from 8 to twenty-four minutes, and were self rewinding.
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Mini Cassette
Media type: magnetic tape
Encoding: analog signal
Capacity: 30 minutes
Read mechanism: tape head
Write mechanism: magnetic recording head
Developed by: Philips
Usage: dictation
The Mini Cassette, often written minicassette
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Media type: magnetic tape
Encoding: analog signal
Capacity: 30 minutes
Read mechanism: tape head
Write mechanism: magnetic recording head
Developed by: Philips
Usage: dictation
The Mini Cassette, often written minicassette
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Microcassette
A Microcassette is significantly smaller than a Compact Cassette
Media type: Magnetic tape
Encoding: Analog signal
Capacity: MC60 (30 min per side at 2.
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A Microcassette is significantly smaller than a Compact Cassette
Media type: Magnetic tape
Encoding: Analog signal
Capacity: MC60 (30 min per side at 2.
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Steno-Cassette
The Steno-Cassette can be distinguished from other formats by its integrated tape counter
Media type: magnetic tape
Encoding: analog signal
Capacity: 30 min
Read mechanism: tape head
Write mechanism: tape head
Standard: DIN 32750
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The Steno-Cassette can be distinguished from other formats by its integrated tape counter
Media type: magnetic tape
Encoding: analog signal
Capacity: 30 min
Read mechanism: tape head
Write mechanism: tape head
Standard: DIN 32750
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Elcaset was a short-lived audio format created by Sony in 1976. At that time, it was widely felt that the compact cassette was never likely to be capable of the same levels of performance that was available from reel-to-reel systems, yet clearly the cassette had great advantages in
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