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To record sound and play it back. In America. By Thomas Edison
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The sounds were stored on a flat disc. By Emile Berline
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It records magnetic particles and then they are reproduced as sound.
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It was used to record with the tape recorder. By Philips
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By engeeners at the Sony corporation. It was invented in Japan. Could not record sound. It was easier to trouble, run, walk... with it.
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By the companies Philips and Sony. The sound is recorded digitally as a series of numbers.
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Nowadays, people listen to music on their computers, mobile phones, mp3, mp4...
