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The first sound to be recorded by a machine wasn't intended ever to be heard again—but modern researchers found a way around that problem.
Early sound recording hi-res stock photography and images - Alamy
Soundtrack to history: 1878 Edison audio unveiled
What is the first sound ever recorded by a machine?
Birth of recorded sound
Phonautograph, recording device
History amended by earliest recording of sound
Scott Edison's Instagram, Twitter & Facebook on IDCrawl
The Phonautograph the 1857 invention of Frenchman Edouard Léon Scott, 20 years before Edison's phonograph. Sound collection barrel or resonator Voice enters. - ppt download
Thomas Edison - Wikipedia
PPT - The Edison Cylinder Phonograph PowerPoint Presentation, free download - ID:3844867
A History of Recording Sound New Inventions Lead to New Inventions! - ppt download
The Forgotten Genius Who Recorded The First Sound In 1857