If you think of records as platters, you are of a certain age. If you don’t remember records at all, you are even younger. But there was a time when audio records were not flat — they were drums, ...

Phonograph: Edison's great achievements often involved perfecting other people's ideas, but his phonograph, a machine to record sounds, was completely new. His first phonograph used a tinfoil-covered ...

When Thomas Edison invented the phonograph, he gave the world its first device that could both record and replay sound. A vibrating diaphragm pressed a stylus into soft wax, carving microscopic ...