By wrapping the tin foil around the cylinder, and thanks to a needle oscillating along the vibrations of the sound creating grooves of different depths on the tin he recorded the song “Mary had a little lamb ”. And by using a needle and diaphragm, Edison reproduced the recording. Studying Edison electric light bulbs had forgotten his invention for several years. Only later, when he regained his fascination with sound reproduction, did he invent a series cylindrical cylinder by creating a monolithic cylindrical mold of the original cylinder through electroplating.
In 1887, Edison continued to develop a series of cylindrical record players. This process lasted until 1890 when he used a wax that, when put into the mold, could shrink when cooled, making it easy to remove. At this time, a phonograph invented by Emil Berliner based on the principle of Edison’s own operation began to dominate the market, one difference was that the device could record the vibrations of sound on a zinc plate instead. because on cylindrical rotating tubes. The device is called a recorder, it creates grooves in the plane of the disc. The replacement sound will be recorded through spiral grooves of constant depth on a flat disc. Berliner called this type of disc a recording.
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