But there was a time when audio records were not flat — they were drums, which was how the original Edison phonograph worked. [Our Own Devices] did a video earlier showing one of these devices ...

The setup of the Menlo Park laboratory was especially suitable for invention and product development, and Edison’s lab was considered a model for modern research ... plastics and waxes for disc and ...

In 1877, Thomas Alva Edison (1847 – 1931) invented the tin foil phonograph – a machine that recorded sound by indenting a sheet of tin foil into a groove in a cylinder. A later wax version was ...

In a way, of course, all this goes back to Thomas Edison’s invention of the phonograph 80 years earlier ... and etched grooves into a paper cylinder coated with a black pigment.