Glimpse Of The Aggregate by Bradley S. Green published on 2014-10-04T19:25:13Z This piece is based on a compositional technique called rotation theory. A short melody is placed on a graph in which the X axis represents time and the Y axis represents pitch. The melody is then rotated either clockwise or counterclockwise on its centroid by certain degrees. In this case, it was rotated 60º, 100º, and 130º clockwise; and 50º, 80º, and 90º counterclockwise. The degrees of rotation were found by indeterminate means (rolling dice). The resulting notated rotations are then used to compose the piece. The rules are that each rotation must be completed if started, they can be transposed only by octave, and the time can be evenly augmented or diminished (for example, if the original rotation contains two successive half notes, then they can be augmented to two successive whole notes or diminished to two successive quarter notes). Genre composition