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The conductorless orchestra, sometimes referred to as a self-conducted orchestra or unconducted orchestra, is an instrumental ensemble that functions as an orchestra but is not led or directed by a conductor. Most conductorless orchestras are smaller in size, and generally perform chamber orchestra repertoire. Several conductorless orchestras are made up of only strings and focus primarily on string orchestra repertoire. Conductorless orchestras generally come from the classical music tradition and perform standard repertoire, but many conductorless orchestras promote or specialise in contemporary classical music repertoire. Many contemporary classical music ensembles also regularly perform without a conductor.