“The early-music revolution, which began on the fringes, can claim to have triumphed. It has also evolved: the very term “early music,” which originally denoted a repertory (pre-Classical, later pre-Romantic) and the instruments appropriate to it, has come to stand more broadly for a performance aesthetic, an approach to music in the context of its time that has been carried into 19th- and even 20th-century repertory.”