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