The term aggregate is used to define a structure that is formed from seemingly disparate elements. The percussion section introduces this concept musically with simple patterns in 4 contrasted by more complex patterns in 5, both of which are performed on the hi hat. This homogenous timbre provides a sense of unity that molds the two disparate patterns into one more unique pattern. The entrance of the solo euphonium expands on the aggregate concept by focusing on range instead of rhythm. The euphonium, which is known for its impressive range and flexibility, allows the soloist to embody both the disparate elements and the unified aggregate, by quickly jumping between octaves and presenting them as one cohesive sound in performance. As the rest of the brass slowly enters, one more facet of the concept is illuminated. That facet, called hocket technique, refers to the division of a single line between multiple instruments. In this instance, the disparate elements arise from each instruments unique timbre, range, and spatialization, while the unifying element is the line itself. Throughout the piece, as these concepts unfold and develop, the solo euphonium leads the way, becoming the strongest unifying element.