Roland Büchner, Regensburg Cathedral Choir, David Cordier, Wiener Sängerknaben, Helmut Froschauer, Cologne Radio Orchestra, Martin Flämig, Dresdner Kreuzchor, Michael-Christfried Winkler, Emil Tabakov, Bulgarian National Choir, Frankfurt Vocal Ensemble, Ralf Otto, Basso, Il, Berlin Singakademie, Staatskapelle Berlin, Dietrich Knothe, Berlin Radio Choir, Marcus Creed, Rundfunk-Sinfonieorchester Berlin, RIAS Chamber Chorus, Jorg-Peter Weigle, Leipzig Radio Chorus, male section, Sofia Philharmonic Orchestra, Peter Marschik, Stuttgart Philharmonic Orchestra, Michael Knapp, Ernst Jankowitsch, RIAS Symphony Orchestra, Rheinische Kantorei, Das Kleine Konzert, Hermann Max, CantArte Regensburg, Hubert Velten, Gabriele Ferro, Cologne Radio Chorus, Cappella Coloniensis, Herbert Lippert, Ildikò Raimondi, Bernarda Fink, Martin Haselbock, Vienna Academy, Helmut Wildhaber, Hugo Distler Choir, Uwe Gronostay, Janos Ferencsik, Bratislava Philharmonic Chorus, Bratislava Philharmonic Orchestra, Rudolf Barshai, Russian National Orchestra, Ursula Fiedler, Jakob Stampfli, Barbara Hölzl, Werner Hollweg, Sveshnikov Boys and Men's Choir, Celina Lindsley, Franco de Grandis, Vincente Ombuena Valls, Stefania Toczyska, Olga Romanko, Moscow Rybin Choir, Georgi Robev, Boris Christoff, Todor Grigorov, Sofia Orthodox Ensemble, Miroslav Popsavov & Nicola Ghiuselev
