On the basis of the formalizable characteristic of music rhythm, a probabilistic context free grammar (PCFG) system was defined to describe the relatively independent music rhythm elements.

• 基于音乐节奏本身具有可被形式化的特性，定义了一个概率上下文无关文法(PCFG)系统来描述相对独立的音乐节奏元素。