When I visited Warsaw last winter, I was happy to pick up several recordings containing music of Agata Zubel, one of the most gifted of younger Polish composers. There is now a strong compilation on the Kairos label, the principal item being her grittily expressive Beckett setting NOT I. A vocalist of high accomplishment and distinctive timbre, Zubel sings in this work and in Aphorisms on Miłosz and Labyrinth; Clement Power conducts the Klangforum Wien in a program that also includes Shades of Ice.