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Sound Recording
may now be done in one central building or in portable stage units. But less than a decade ago there were sound effects wanted for Trader Horn which could not be made then because certain African roads and bridges were unable to support the weight of the truck carrying the heavy sound recording equipment. The truck weighed fourteen tons and it could penetrate Africa only so far as that weight could go with safety.
Out of this experience, however, clever sound recording research engineers gained much. They saw that their art would be circumscribed and retarded if their devices could not go hither and yon as freely as the more portable motion picture camera. They designed vacuum tubes, condensers, and other portions of the sound recording equipment on a miniature scale. They made lighter devices, which would not work. They made and discarded scores of would-be portable recording equipments.
But, by the time Van Dyke, the same director who made Trader Horn, went to film Eskimo in the Arctic a few years later, a sound recording equipment had been devised weighing only 350 pounds. This weight is divided between five boxes. These boxes can be carried anywhere — by canoe or boat, in the back seat of a light car, on horse or muleback, or by hand. Today, with such portable equipment, there are no places to which the talking picture cannot go and return with both authentic pictures and authentic sound.
What is called the re-recording process is an interesting and valuable development in sound recording technique. Sometimes the sounds originally recorded at the
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