Clarinet quartet

Traditionally, a clarinet quartet is a chamber musical ensemble made up of one clarinet, plus the standard string trio of one violin, one viola and one cello. Nowadays, the term clarinet quartet can also refer to a combination of four clarinets of any size [including (contr)alto and (contra)bass clarinet, and basset horn]. The term is also used to refer to a piece written for any of these ensembles.