A musical composition for four instruments or four singers.
Although any group of four performers can be called a quartet, traditionally the word "Quartet" mainly refered to String Quartet (consisting of two violins, viola, and cello).
Other examples of "Quartets" include Piano Quartet, Flute Quartet, Oboe Quartet... Traditionally, various "Quartets" are comprised of a String Trio (violin, viola, cello) with an instrument that is not part of the string family.
In addition, "Quartet" can also be used to refer various combinations of mixed instruments, such as woodwind quartets, brass quartets, and vocal quartets.
Writer: Frankie Chan