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Phonographic Cylinders were the earliest form of listening to music. They also could record music as well if you wanted to make your own during this time period.

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The Gramophone is also known as the phonograph or the vinyl record. This was the first type of its kind to be able to store analog sound in a system.

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The radio was revolutionary because it was the first portable device that you could take with you to listen to music with.

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Cassette tapes were revolutionary because they allowed music to go into your pocket and you could listen to it while exercising.

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The CD was revolutionary because it was the first form of music that could be used electronically.

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Bluetooth was revolutionary because it was the first form of technology because it allowed to listen to music from your phone through your car.

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Spotify came out in 2008. However, it did not become popular until recently and people had no idea when it came out.

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Apple Music was the first app that allowed people to download music without spending money.