Eds. recorded: Universal Edition (1st work); Boosey & Hawkes (2nd work). Program notes in German with English and French translations (26 p. : ports. ; 13 cm.) inserted in container. Recorded Dec. 15-16, 2008, and Mar. 21-22, 2009, Studio Stolbergerstrasse, Cologne. GrauSchumacher Piano Duo ; Franz Schindlbeck, Jan Schlichte, percussion.