"Chance procedures" . "Aleatoric music" . . "aleatoric contemporary music" . . "Randomness" . . "Aleatoric" . "chance" . . "formulaically created" . "Aleatoric music#Open form music" . "chance operations" . "of chance" . "aleatory composition" . "mobile form" . "indeterminacy" . "mobile scores" . "chance composition" . . . "controlled chance music" . "aleatoric approach" . "Aleatoric music" . . "aleatory music" . "polyvalent" . . "mobile structure" . "chance music" . "aleatoric techniques" . "chance-based music" . "aleatorism" . "open-form" . "\\\"open\\\" form" . "aleatorics" . . "aleatory" . . "aleatoric music" . "aleatoric" . "Aleatoric music#\\\"Open form\\\" chance music" . "open form" . "polyvalent form" . "Aleatory" . . "aleatoric rhythms" . "aleatoric composition" . "Aleatoric, aleatoric music" . "alea" . "aleatoricism" . "mobile" . . . "aleatory techniques" . . .