Deutsche Grammophon's budget-priced, four-CD collection of all the works by György Ligeti in its catalog has many things to commend it, beginning with the title. Clear or Cloudy is a profoundly astute description of the composer's career, encompassing both the great sound clouds of his micropolyphonic work of the 1960s, such as Atmosphères, Volumina, Lux aeterna, and Lontano, and the crystalline clarity of his early years, demonstrated in Six Bagatelles for wind quintet and his first String Quartet, as well as in his Etudes pour piano and Piano Concerto from his final period.