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Compatible Discrete 4, also known as Quadradisc or CD-4 (not to be confused with compact disc) was a discrete four-channel quadraphonic system for phonograph records. The system was created by JVC and RCA in 1971 [1] and introduced in May 1972. Hundreds of recordings using this technology were released on LP during the 1970s. [2]
The Chicago Talking Machine Company (sometimes The Talking Machine Company of Chicago, or simply The Talking Machine Company) was a manufacturer and dealer of phonographs, phonograph accessories, and phonograph records from 1893 until 1906, and a major wholesaler of Victor Talking Machine Company products between 1906 and at least 1928. [1]
Three vinyl records of different formats, from left to right: a 12 inch LP, a 10 inch LP, a 7 inch single. A phonograph record (also known as a gramophone record, especially in British English) or a vinyl record (for later varieties only) is an analog sound storage medium in the form of a flat disc with an inscribed, modulated spiral groove.
The Sentinel Chromatron recorded on a single side of uncoated aluminum; its records were read with a fibre needle. It was "rather unstable technology" which produced poor sound quality in comparison to shellac records and was rarely used after 1935. [1] RCA Victor introduced home phonograph disk recorders in October 1930.
The LP (from long playing [2] or long play) is an analog sound storage medium, specifically a phonograph record format characterized by: a speed of 33 + 1 ⁄ 3 rpm; a 12- or 10-inch (30- or 25-cm) diameter; use of the "microgroove" groove specification; and a vinyl (a copolymer of vinyl chloride acetate) composition disk.
Emile Berliner (May 20, 1851 – August 3, 1929) originally Emil Berliner, was a German-American inventor.He is best known for inventing the lateral-cut flat disc record (called a "gramophone record" in British and American English) used with a gramophone.
Catalogue of commercially available records released in Jan 1895. Some of the 1892 recordings can be seen (namely BeA 205, 256 and 300) Documenting the output of American Berliner has proved a daunting task, as original records are scarce collector's items and the company employed a system of block numbering that seems to make little sense.
Phonograph cylinders (also referred to as Edison cylinders after its creator Thomas Edison) are the earliest commercial medium for recording and reproducing sound.Commonly known simply as "records" in their heyday (c. 1896–1916), a name which has been passed on to their disc-shaped successor, these hollow cylindrical objects have an audio recording engraved on the outside surface which can ...
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