Groups of clarinets playing together have become increasingly popular among clarinet enthusiasts in recent years. Common forms are:
Clarinet choir, which features a large number of clarinets playing together, usually involves a range of different members of the clarinet family (see Extended family of clarinets). The homogeneity of tone across the different members of the clarinet family produces an effect with some similarities to a human choir.[73]
Clarinet quartet, usually three B♭ sopranos and one B♭ bass, or two B♭, an E♭ alto clarinet, and a B♭ bass clarinet, or sometimes four B♭ sopranos.[74]
Clarinet choirs and quartets often play arrangements of both classical and popular music, in addition to a body of literature specially written for a combination of clarinets by composers such as Arnold Cooke, Alfred Uhl, Lucien Caillet and Václav Nelhýbel.[75]