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