A modern orchestra is a larger and more diverse instrumental ensemble than most of its predecessors. It usually includes of the four major instrument sections, as well as additional speciality performers according on the repertoire's requirements. The woodwind and string sections use instruments that are similar to those used in Romantic era orchestras in the 19th and early 20th centuries. The brass section has a few instrument alterations, while the percussion section has the most visible differences in the modern orchestra.
