User:Lord of foxes

= 78 rpm record = The 78 rpm record (colloquially referred to as a 78, a shellac record, or simply as shellac) is a specific type of phonograph record and is one of the earliest media for recording audio. As with all phonograph records, they are flat discs that contain a spiral, modulated groove that can be reproduced into sound waves. In general, they are 10 inches (25 centimeters) in diameter, usually composed of an infamously fragile shellac-based resin, have a capacity of roughly three minutes of audio, and rotate at a standardized speed of 78.26 rpm. The format was the most common medium used to store audio until it was superseded by the 7 inch 45 rpm and 12 inch 33⅓ rpm vinyl record in the mid-1950s.

History
In 1898