Orchestral music written for a group of solo instruments (concertino), contrasted with a tutti of strings (ripieno). The concertino is the same as the trio sonata ensemble (two violins + continuo). It often has three movements: a long first movement in ritornello form, a slow second movement, and a quick finale (usually a rondo). First appeared as an expansion of contrapuntal trio sonata. It may be played by as few as four performers or, by doubling the parts many times, up to 60 performers. Concerto grosso is more a forerunner of the modern symphony [concertante] than of the modern concerto.