Ilana Davidson, Marc Acito, Donald Collup, James Mabry, Donald P. Lang, Fredonia Chamber Singers, Dortmund University Chamber Choir, New York University, wind players, Westphalian Chamber Orchestra, Linda Mabry, Klemens Koerner, Willi Gundlach, Westphalian Symphony Orchestra, Hilke Helling, Thomas Fischer, Tobias Schmeisser, Ulrich Schutte, Thomas Brautigam & Michael Knoppel