Four Movements for Solo Percussion
These movements were created using evolutionary algorithms to develop a population of rhythmic motives, initially generated through probabilities. Each population is a single rhythmic phrase, and can last from two to over twenty beats. Once a series of generations (up to fifty) were derived, a genetic operator was run to determine the best ordering and repetition of individual populations, while another genetic operator was run to combine divergent populations. The evolution of the individual rhythmic ideas are clearly heard as they evolve, mutate, and combine to form new individuals.
Movement 1 is the “baseline” – composed by myself without the use of the computer, whereas the other three are entirely machine-composed. The purpose is to compare my “real” compositional aesthetic (when I compose by hand) with my metacreative system (which is a codification of my personal compositional aesthetic).
Performed by Daniel Tones
Goldcorp Centre for the Arts, Vancouver, December 2011