Hip-hop DJs spin turntables back and forth so that sections of sound are played forwards and backwards

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Hip-hop DJs spin turntables back and forth so that sections of sound are played forwards and backwards quickly. Try combining backwards play (Program 108 (page 248)) and frequency shifting (Program 116 (page 261)) to get the same effect. Play a second of a sound quickly forward, then quickly backward, two or three times. (You might have to move faster than just double the speed.)


Data from Program 108

def reverse(source): target = makeEmptySound (getLength(source)) sourceIndex = getlength (source)-1 for targetIndex in range (0,getLength(target)): sourceValue = getSampleValueAt (source, sourceIndex) setSampleValueAt(target, targetIndex, sourceValue) sourceIndex = sourceIndex - 1 return target


Data from Program 116

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