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Local 5 - weareiowa.com | Des Moines Local News & Weather | Des Moines, Iowa

"Sound on Film" with the Iowa Almanac

Professor Jeff Stein tells us about Lee de Forest's Phonofilm invention that made its debut on April 15, 1923.

Professor Jeff Stein tells us about Lee de Forest's Phonofilm invention that made its debut on April 15, 1923.