Stone to Silicon

Communication · 1935

Magnetic tape recording

AEG's Magnetophon records sound on coated plastic tape that can be edited and erased.

The German Magnetophon, shown in Berlin in 1935, recorded on iron-oxide-coated plastic tape; high-frequency bias in 1940 made it near studio quality. Tape transformed music production and radio, and the same principle stored computer data and video.

See it in the living treeWikipedia

Arcs above join it to what it stood on, arcs below to what it led to. The bar places this stretch on the tree's whole timeline.

What it built on 3

What it led to 1

Related measurements

The dashed line marks when it first worked.

Cost of memory and storage Latest: Memory: 1.09k $/TB (2023) Source: Our World in Data