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Edison accidentally discovered that he had recorded sounds that resembled a human voice.
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Period: to
dates
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Emil Berliner inveted the gramophone
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The first electrical recording issued to the public
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RCA Victor introduced an early version of a long-playing record for home use in September 1931
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sony introduced a 30cm record playing time 150 minutes
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In 1979, Phillips and Sony started off a joint working group in order to design a successful digital audio disc
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When the cd was inveted
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A cd that could fit in you pocket
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Citations
Works Cited
Brain, Marshall. Http://www.google.com/imgres?q=pictures+of+old+cds&num=10&hl=en&safe=active&client=safari&rls=en&biw=1024&bih=964&tbm=isch. © 1998-2012. Photograph. N.p.
Http://www.xm2rss.com/the-duplication-and-utilization-of-mini-cds. 01 10th, 2011. Photograph. N.p.
"Philips Research." - History of the CD. N.p., n.d. Web. 29 Oct. 2012. http://www.research.philips.com/technologies/projects/cd/index.html.
"Welcome!" The CD Information Center. N.p., 25 Oct. 2012. Web. 30 Oct. 2
