Kinetophone

Kinetophone The first device that added sound to motion pictures was developed by Thomas Edison and William Kennedy Dickson in 1889. It came to be called the Kinetophone. In a 1912 version the audio, using a Higham amplifier, was provided by large Blue Amberol cylinders, 4 3/8 inches in diameter and 7 1/4 inches long. The cylinder played up to six minutes, running 120 rpm, with groove pitch of 100 lines per inch. Kinetophone films (projected with the Kinetoscope) were single-reel shorts of six…