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the first phonograph was invented by thomas eddison
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this is when the phonograph became popular
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this was the date when the famous radio was invented
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this is when the radio was popular
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when things got a little more up to date and the phonograph got replaced with other better music players
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this is when the mp3 became popular worldwide
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this is when it was not being ised anymore
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it was invented in germany by a guy named fraunhofer-gesellshaft
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this is the dade when the new ipod came out and made the mp3 unpopular