For years, New York City seemed to have missed out on the extraordinary efflorescence of research, study, and practice, which has made historically informed performance such an essential part of music-making in the late 20th and early 21st centuries. The early music scene was hardly non-existent, but it was thin in comparison to centers like Boston, London, Amsterdam, and Paris, patronized by a small band of enthusiasts who at one time actually looked the part, crowding into Manhattan’s less fashionable churches in colorful woolen tunics, knitted caps, and Earth Shoes. There don’t seem to be many of those people left around, and a much larger range of audiences, spanning all age groups, now hear historical performances in the major venues, especially Carnegie Hall