SESTET or SEXTET (Fr. Sextuor; Ital. Sestetto). A composition for six instruments, or six voices, with or without accompaniment.Instrumental sestets are of two kinds; those for strings only, which belong to the same class as string quartets and quintets, being monochromes in six real parts, and those for various combinations of strings, wind and pianoforte, which belong to the class of pianoforte quartets etc., and may be regarded as miniature symphonies. The first of these two classes is, naturally, but rarely met with, six-part harmony not being easy to write; but...