I was reading about the Phonograph the other day
A phonograph record is a flat disc with inscribed spiral grooves
Yeah they said that it was revolutionarynat the time
Phonograph record
A phonograph record (also known as a gramophone record, especially in British English, or simply record) is an analog sound storage medium in the form of a flat disc with an inscribed, modulated spiral groove. The groove usually starts near the periphery and ends near the center of the disc. At first, the discs were commonly made from shellac; starting in the 1940s polyvinyl chloride became common. In recent decades, records have sometimes been called vinyl records, or simply vinyl or even vinyls.
-shaped in cross-section, but Edison discouraged all such alternatives by cautioning on some of his record sleeves: "This Re-Creation should not be played on any instrument except the Edison Diamond Disc Phonograph and with the Edison Diamond Disc Reproducer, and we decline responsibility for any damage that may occur to it if this warning is ignored." The very good reason for such discouragement was that Diamond Disc grooves were too narrow and fragile to propel a soundbox across a record surface, as lateral machines did; Edison's