Tangible Media: Removable Storage of Image, Sound, Motion and Data
Tangible Media: Removable Storage of Image, Sound, Motion and Data
Tangible Media: Removable Storage of Image, Sound, Motion and Data
Grooves
Recordgraph

Date:

c. 1945

Material:

Cellulose acetate movie film

Dimensions:

Width: 35 mm width
Length: 50 ft. (15.24 m)

Company:

Recordgraph Corp.

Location:

New York

50 ft. loop of 35 mm acetate film holding 1½ - 3 hours of audio in an embossed groove. Used by the FBI and the military, most famously to record the Normandy invasion live in WW II.