Read the excerpt from A History of the World in 100 Objects.The slit drum began its life in Central Africa, in the region where Sudan and the Congo share a frontier, and it would have been part of the court orchestra of a powerful chief... The flanks of the drum have been carved to different thicknesses, so that a skilled drummer with a traditional drumstick can produce at least two tones and as many as four distinct pitches.
Answer
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It would signal to the listener that more important ideas about the slit drum’s history would be coming in the next section.
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It would emphasize to the listener how different drums and other musical instruments sounded like in the past.
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It would make the listener more able to feel the same emotions as the people who had heard the drums in the past.
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It would make it easier for the listener to duplicate the sounds the drums made on his or her own musical instruments.