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The first device capable of recording sound signals was Léon Scott de Martinville
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the first recording of the human voice
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helped william S. arnold
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disc phonograph
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portable radio
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portable player
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ipod classic
Plan projects on a visual timeline
Map milestones, phases, deadlines, and key events in one place so the sequence is easier to see and share. Timetoast is a timeline maker for work, school, research, and stories.