By the 1920s, more than 150 companies were making records and record players, which played discs. The discs were typically seven inches in diameter and played at a speed of 78 revolutions per minute. Each side of the disc held about three minutes of recording, which is the equivalent of a song (Miller 35).
Early radio broadcasting began in the 1920s (Miller 36). The radio helped promote records and provide music for listeners for free. The radio helped the recording industry.
In the late 1940s and early 1950s, long playing (LP) records came out. They were developed by Columbia Records in 1948 and allowed music labels to put more music on a disc. It allowed labels to put up to 25 minutes of music on each side of the disc (Miller 37). This allowed musicians to be more creative with their music. Later, singles came out, which were 7 inch vinyl discs that had a large hole in the center and rotated at 45 revolutions per minute (Miller 39). They were good for distributing hit songs. They could hold up to five minutes of music per side.
In 1945, Paul Klipsch released the Klipschorn folded horn speaker, shortly after World War II. It contributed to the birth of a"Hi Fi" era. This era was concerned with creating stereo and transistor radios, as well as cassette tape players (Schoenherr).
In 1954, the transistor radio was released. It was patented by Richard C. Koch. The first radio was the TR-1 model and it was sold for ...
... middle of paper ...
...t: Greenwood, 2005. Google Books. Greenwood Press. Web. 2 May 2014.
Riebe, R. Randal. "Get On My Cloud." Systems Contracter News Sept. 2012: 90. ABI/INFORM Complete. Web. 1 May 2014.
Schoenherr, Steven. "Recording Technology History." www.web.archive.org. Steven E. Schoenherr, 6 July 2005. Web. 2 May 2014.
Taylor, Timothy D., Mark Katz, and Tony Grajeda. Music, Sound, and Technology in America: A Documentary History of Early Phonograph, Cinema, and Radio. N.p.: Duke UP, 2012. Google Books. Web. 29 Apr. 2014.
Valerdi, Ricardo. "The Cloud Systems." Industrial Engineer n.d.: 28. ABI/INFORM Complete. Web. 1 May 2014.
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