Peter Goldmak invented what in 1948

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Muskan Anand

2 years ago

In 1948, Goldmark invented the LP by slowing the record from 78 revolutions per minute (rpm) to 33 1/3 rpm, increasing the length of the groove and decreasing its width. He made the LP of vinyl rather than shellac, and improved the phonograph's stylus and tone arm.

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