1970s

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1970

>> Sound Salvador Dalí (fragment interview)

1974

DuPont uses chrome dioxide in the emulsions of magnetic tapes for the first time.

First film with the Sensurround sound system: Earthquake by Mark Robson.

Ken Russell's Tommy is the first film with the Dolby Stereo sound system, which became popular after George Lucas's Star Wars.

1979

Sony launches the popular Walkman onto the market.