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Talking Tapes

submitted by Aard Vark

(oritteropo)
8 years 7 months ago

YouTube description:

Just as vinyl records have a pattern of grooves and ridges that contain the sound, talking tapes - which were originally developed in 1918 - work on the same principle. Along the length of the tape is a fine pattern of grooves, and when you run your finger nail along the tape, you can 'play' the encoded message.

See http://www.grand-illusions.com/acatalog/Talking_Tapes.html