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This piece is an aleatoric composition, which means that some part of the compositional or performance processes are left to chance.
The piece is comprised of two sets of "cells" (short, discrete sets of note patterns, usually two to four measures in length). There is one set of cells for a soloist on an instrument in the key of C and one set of cells for piano accompaniment. The performers choose which cells to play, in which register to play them, in which order to play them, at what volume, and for what duration. They are not required to coordinate these decisions before performing the piece. The tempo of the piece is dictated by the performers but should be coordinated between them (both of them will play a quarter note of the same length, and their measures will have equal lengths, although they choose how fast to go).
The piece ends when the soloist decides to perform the ending cadenza, which is performed without the piano accompaniment. This happens at the discretion of the soloist.
This recording was performed by Stephen Trenier (trombone) and Alicia Rheiner (piano) in 2008.