随机 樂/乐 is 底/基于 on a 过程 in which the 可能 of proceeding from one state or set of states is 定义 The 时间 演变 of the 过程 is therefore governed by a kind of 加权 随机性 which can be chosen to give anything from an entirely 确定 结果 to an entirely 不可预知 one 源 - Trevor Wishart 1994 可听 设计 York Orpheus the Pantomime