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Audio Format
An audio format is a medium for sound recording and reproduction. 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 physical method used to store the data. Music is recorded and distributed using a variety of audio formats, some of which store additional information. Timeline of audio format developments See also * Timeline of video formats * Format war * Audio data compression References External links History of Recording TechnologiesMuseum Of Obsolete Media – Audio Formats {{DEFAULTSORT:Audio Format Technology timelines audio Audio most commonly refers to sound, as it is transmitted in signal form. It may also refer to: Sound *Audio signal, an electrical representation of sound *Audio frequency, a frequency in the audio spectrum * Digital audio, representation of sou ... Obsolete tec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sound Recording And Reproduction
Sound recording and reproduction is the electrical, mechanical, electronic, or digital inscription and re-creation of sound waves, such as spoken voice, singing, instrumental music, or sound effects. The two main classes of sound recording technology are analog recording and digital recording. Sound recording is the transcription of invisible vibrations in air onto a storage medium such as a phonograph disc. The process is reversed in sound reproduction, and the variations stored on the medium are transformed back into sound waves. Acoustic analog recording is achieved by a microphone diaphragm that senses changes in atmospheric pressure caused by acoustic sound waves and records them as a mechanical representation of the sound waves on a medium such as a phonograph record (in which a stylus cuts grooves on a record). In magnetic tape recording, the sound waves vibrate the microphone diaphragm and are converted into a varying electric current, which is then converted t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dictaphone Sylinder
Dictaphone was an American company founded by Alexander Graham Bell that produced dictation machines. It is now a division of Nuance Communications, based in Burlington, Massachusetts. Although the name "Dictaphone" is a trademark, it has become genericized as a means to refer to any dictation machine. History The Volta Laboratory was established by Alexander Graham Bell in Washington, D.C. in 1881. When the Laboratory's sound recording inventions were sufficiently developed with the assistance of Charles Sumner Tainter and others, Bell and his associates created the Volta Graphophone Company, which later merged with the American Graphophone Company, which itself later evolved into Columbia Records. The name "Dictaphone" was trademarked by the Columbia Graphophone Company in 1907, which soon became the leading manufacturer of such devices. This perpetuated the use of wax cylinders for voice recording, which had otherwise been eclipsed by disc-based technology. Dictaphon ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pathe Disc
Pathe or Pathé may refer to: * Pathé, a French company established in 1896 * Pathé Exchange, U.S. division of the French film company that was spun off into an independent entity * Pathé News, a French and British distributor of cinema newsreels, now known as British Pathé * Pathé Records, a French and American record label * Pathé Records (China), a producer of Chinese recordings * Pathe, Mingin, Burma * Pathé, one of the three components of Epicureanism#Epistemology * M. Pathe, a Japanese film studio no longer active People * Amadou Pathé Diallo (born 1964), Malian footballer * Charles Pathé, (1863–1957), principal & co-founder of Pathé * Pathé Bangoura (born 1984), Guinean footballer * Pathé Ciss (born 1994), Senegalese footballer See also * Gaumont-Pathe Archives ** Les Cinémas Gaumont Pathé * MGM-Pathé Communications MGM-Pathé Communications was an American film production company that operated in Los Angeles County, California from 1990 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phonograph Record
A phonograph record (also known as a gramophone record, especially in British English), or simply a record, is an analog sound storage medium in the form of a flat disc with an inscribed, modulated spiral groove. The groove usually starts near the periphery and ends near the center of the disc. At first, the discs were commonly made from shellac, with earlier records having a fine abrasive filler mixed in. Starting in the 1940s polyvinyl chloride became common, hence the name vinyl. The phonograph record was the primary medium used for music reproduction throughout the 20th century. It had co-existed with the phonograph cylinder from the late 1880s and had effectively superseded it by around 1912. Records retained the largest market share even when new formats such as the compact cassette were mass-marketed. By the 1980s, digital media, in the form of the compact disc, had gained a larger market share, and the record left the mainstream in 1991. Since the 1990s, records con ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Edison Records
Edison Records was one of the early record labels that pioneered sound recording and reproduction, and was an important player in the early recording industry. The first phonograph cylinders were manufactured in 1888, followed by Edison's foundation of the Edison Phonograph Company in the same year. The recorded wax cylinders, later replaced by Blue Amberol cylinders, and vertical-cut Diamond Discs, were manufactured by Edison's National Phonograph Company from 1896 on, reorganized as Thomas A. Edison, Inc. in 1911. Until 1910 the recordings did not carry the names of the artists. The company began to lag behind its rivals in the 1920s, both technically and in the popularity of its artists, and halted production of recordings in 1929. Before commercial mass-produced records Thomas A. Edison invented the phonograph, the first device for recording and playing back sound, in 1877. After patenting the invention and benefiting from the publicity and acclaim it received, Edison a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tape Bias
Tape bias is the term for two techniques, AC bias and DC bias, that improve the fidelity of analogue tape recorders. DC bias is the addition of direct current to the audio signal that is being recorded. AC bias is the addition of an inaudible high-frequency signal (generally from 40 to 150 kHz) to the audio signal. Most contemporary tape recorders use AC bias. When recording, magnetic tape has a nonlinear response as determined by its coercivity. Without bias, this response results in poor performance, especially at low signal levels. A recording signal that generates a magnetic field strength less than the tape's coercivity cannot magnetise the tape and produces little playback signal. Bias increases the signal quality of most audio recordings significantly by pushing the signal into more linear zones of the tape's magnetic transfer function. History Magnetic recording was proposed as early as 1878 by Oberlin Smith, who on 4 October 1878 filed, with the U.S. pa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Peirce Wire Recorder
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Peirce may refer to: Schools * Peirce College, Philadelphia, formerly known as Peirce College of Business, Peirce Junior College and Peirce School of Business Administration * Peirce School (also known as Old Peirce School), West Newton, Massachusetts * Helen C. Peirce School of International Studies, an elementary school in Chicago Others * Peirce (crater), a lunar crater * Peirce (given name), including a list of people with the given name * Peirce (surname), including a list of people with the surname See also * * * Pierce (other) * Peirse (other) Peirse may refer to: People with the surname *Henry Peirse (1750s-1824), English politician *Richard Peirse (Royal Navy officer) (1860-1940), English Royal Navy officer *Richard Peirse (1892-1970), English RAF commander *Richard Peirse (RAF officer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wire Recording
Wire recording or magnetic wire recording was the first magnetic recording technology, an analog type of audio storage in which a magnetic recording is made on a thin steel wire. The first crude magnetic recorder was invented in 1898 by Valdemar Poulsen. The first magnetic recorder to be made commercially available anywhere was the Telegraphone, manufactured by the American Telegraphone Company, Springfield, Massachusetts in 1903. The wire is pulled rapidly across a recording head which magnetizes each point along the wire in accordance with the intensity and polarity of the electrical audio signal being supplied to the recording head at that instant. By later drawing the wire across the same or a similar head while the head is not being supplied with an electrical signal, the varying magnetic field presented by the passing wire induces a similarly varying electric current in the head, recreating the original signal at a reduced level. Magnetic wire recording was replaced ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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