Wolfgang Rihm Jagden und Formen Bavarian Radio Orchestra, Franck Ollu, conductor BR-Klassik CD   Wolfgang Rihm’s hour long orchestra work Jagden und Formen (2008) has its roots in an earlier work, some fifteen minutes long, from 1996, dedicated to Helmut Lachenmann on his sixtieth birthday. The piece ultimately morphed and expanded into the version recorded here. There is precedence for this in postwar Europe, particularly in several of the works of Pierre Boulez, which remained in progress and perpetually expanding throughout his lifetime. In his program note, Rihm says that the piece will henceforth likely remain in its current form.