Promulgation is an interactive composition in which the orchestra and computer communicate through musical motives contained in the Command Motive Score. The musical content as well as the highly organized aleatoric environment is controlled by a system of probabilities. The orchestra is divided into four ensembles of dissimilar instrumentation. The music consists of several scores that are performed different ways. The first score is the Command Motive Score performed by the computer. The second is the Prelude Score performed by the orchestra. The third is the Continuum Score performed by the orchestra. The fourth is a group of scores called Auxiliary Scores performed by each respective ensemble. The fifth is another group of four scores performed by trumpet, cello, piano, and tuba.