In music, accompaniment is the art of playing along with an instrumental or vocal soloist or ensemble, often known as the lead, in a supporting manner. The accompaniment can be performed by a single performer—a pianist, guitarist, or organist —or it can be played by an entire ensemble, such as a symphony orchestra or string quartet (in the classical genre), a backing band or rhythm section (in popular music), or even a big band or organ trio (in jazz).