In the past couple of years, two significant Wolff releases have appeared, demonstrating the undiminished vitality of the last surviving member of the New York School quartet. One is Philip Thomas's three-CD survey of the piano music, on Sub Rosa; the other is a two-CD set of the Duos, for percussion plus one, on New World (with superb notes by George Lewis). A Dischi di Angelica CD has also appeared, but I have yet to hear it.