Final answer:
When changing from triples (three beats per measure) to duples (two beats per measure), the pace of the music often quickens because of the reduced number of beats in each measure.
Step-by-step explanation:
If you start with triples and change to duples, the PACE quickens.
Triple meter refers to a musical meter that has three beats per measure, like in a waltz, where you count "1-2-3, 1-2-3." In contrast, duple meter refers to two beats per measure, counted as "1-2, 1-2." When transitioning from triple meter to duple meter, the pace of the music often feels quicker because there are fewer beats per measure, which can make the music feel more 'driven' or 'urgent'.