连音为在指定的节拍中加以分拆或结合而成的音符组合，包括三连音和二连音。标记方法为加上数字或比例，以指出对固有节拍的改变，有时亦会用向下的中括号或链接线标出连音的范围。

英语Tuplet源于后缀的误用，从Quintu(s)-(u)plet和Sextu(s)-(u)plet等取出。其余代替此字的有：Irrational rhythm、Artificial division、Irregular rhythm、Irregular rhythmic groupings等。

In music a tuplet (also irrational rhythm or groupings, artificial division or groupings, abnormal divisions, irregular rhythm, gruppetto, extra-metric groupings, or, rarely, contrametric rhythm) is "any rhythm that involves dividing the beat into a different number of equal subdivisions from that usually permitted by the time-signature (e.g., triplets, duplets, etc.)" (Humphries 2002, 266). This is indicated by a number (or sometimes two), indicating the fraction involved. The notes involved are also often grouped with a bracket or (in older notation) a slur. The most common type is the "triplet".