Roland Büchner, Regensburg Cathedral Choir, David Cordier, Vienna Boys' Choir, 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
Kenneth Sillito, Academy of St Martin in the Fields, Andrea Vigh, Emil Tabakov, Sofia Philharmonic Orchestra, New Berlin Chamber Orchestra, Michael Erxleben, Günther Höller, Georg Fischer, Cappella Coloniensis, Konrad Hunteler, Jurgen Rost, Budapest Strings, Reinhold Friedrich, Camerata Salzburg, Sandor Vegh, Hartmut Haenchen, Carl Philipp Emanuel Bach Chamber Orchestra, Eszter Horgas, Johannes Goritzki, Cologne Radio Orchestra, Andrew Joy, Linos Ensemble, Lajos Lencsés, German String Trio, Hans Graf & Mozarteum Orchestra Salzburg
Staatskapelle Dresden, Hans Vonk, Bratislava Philharmonic Orchestra, Hermann Prey, Kurt Wöss, Georgi Robev, Bulgarian National Choir, Sofia Philharmonic Orchestra, Sumi Jo, Roberto Paternostro, Rundfunk-Sinfonieorchester Berlin, Josef Protschka, Munich Radio Orchestra, Kurt Peter Eichhorn, NHK Chamber Soloists, Giuseppe Sabbatini, Sylvia Sass, Hungarian State Opera Orchestra & Ervin Lukács
Vassil Stefanov, Sofia Symphony Orchestra, Sofia Philharmonic Orchestra, Bulgarian National Svetoslav Obretenov Choir, Georgi Robev, Emil Tabakov, Sofia National Opera Chorus, Sofia National Opera Orchestra, Boris Hinchev, Ilona Tokody, Andras Mihaly, Hungarian State Opera Orchestra, Andras Korodi, Budapest Philharmonic Orchestra, György Melis, Vilmos Komor, János Sándor, Klára Takács, Giuseppe Patane, Rouslan Raichev, Stefka Evstatieva, Bulgarian Radio Symphony Orchestra, Stoyan Angelov, Wolfgang Schone, Pinchas Steinberg, Cologne Radio Symphony Orchestra, Claudio Otelli, Cecilia Bartoli, Rundfunk-Sinfonieorchester Berlin, Roberto Paternostro, Giuseppe Sabbatini, Michael Knapp, Gertrud Ottenthal, Hermann Prey, Bratislava Philharmonic Chamber Orchestra & Kurt Wöss
Jorg-Peter Weigle, Leipzig Radio Chorus, male section, Rundfunk-Sinfonieorchester Berlin, Dietrich Knothe, Soloists of Berlin Radio Chorus, Berlin Radio Choir, Vienna Boys' Choir, Peter Marschik, Chorus Viennensis, Cologne Radio Chorus, Helmut Froschauer, Dorothe Jansen, Cologne Radio Symphony Orchestra, Dresdner Kreuzchor, Martin Flamig, Herbert Lippert, Ildikò Raimondi, Martin Haselbock, Vienna Academy Orchestra, Hugo Distler Choir, Bernarda Fink, Helmut Wildhaber, Regensburg Cathedral Choir, Roland Buchner, Michael-Christfried Winkler, Marcus Creed, RIAS Chamber Chorus, Dresden Philharmonic Orchestra, MDR Leipzig Radio Choir, Herbert Kegel, MDR Leipzig Radio Symphony Orchestra, Hans-Joachim Ribbe, Bernd Casper, Berlin Radio Chorus (male section), Astrid Pilzecker, Carl Maria von Weber Radio Symphony Orchestra, Berlin Male Choir, Stefan Soltesz, Studentische Madrigalchor Munster, Wolfgang Stahl, Gerhard Mayer, Michael Schoppe, Dieter Fokel, Leipzig Thomaner Choir, Hans-Joachim Rotzsch, Marjana Lipovšek, Luxembourg Radio Symphony Orchestra, Friedrich von Spee Male Choir, Leopold Hager, Bavarian State Orchestra, Bayerische Staatsopernchor, Hanns-Martin Schneidt, Franz Hawlata, Hermann Prey, Regina Klepper, Martin Blasius, Kurt Peter Eichhorn, Martina Borst, Klaus Arp, South West German Radio Kaiserslautern Orchestra, Sundfunkchor Stuttgart, Bo Skovhus, Peter Falk, Stuttgarter Choristen, SWF Radio Orchestra, Sofia Philharmonic Orchestra, Bulgarian National Choir, Georgi Robev, Sofia National Opera Chorus, Sofia National Opera Orchestra, Janos Ferencsik, Hungarian State Opera Orchestra, Hungarian State Opera Chorus & Sandor Solyom-Nagy
Hans Vonk, Staatskapelle Dresden, Renato Bruson, Roberto Paternostro, NHK Chamber Soloists, Josef Protschka, Munich Radio Orchestra, Kurt Peter Eichhorn, Sona Ghazarian, Ruth Ziesak, Marcus Creed, Berlin Deutsches Symphony Orchestra, Deutsches Symphony Orchestra, Berlin, Giuseppe Sabbatini, Jochen Kowalski, Hartmut Haenchen, Carl Philipp Emanuel Bach Chamber Orchestra, Cecilia Bartoli, Michele Pertusi, Rundfunk-Sinfonieorchester Berlin, Natale de Carolis, Petra-Maria Schnitzer, Dimiter Dimitrov, Sofia Symphony Orchestra, Elizabeth Carter, Claudio Otelli, Sumi Jo, Michael Knapp, Gisella Pasino, Gertrud Ottenthal, Daniela Lojarro, Marco Chingari, Nicola Ghiuselev, Sofia Philharmonic Orchestra, Rouslan Raichev, Hermann Prey, Kurt Wöss, Bratislava Philharmonic Orchestra, Marcello Viotti, Frankfurt Radio Symphony, Bamberg Symphony Chorus, Kurt Rydl, Wilfried Gahmlich, Jeanine Thames, Sylvia Greenberg & Jerrold van der Schaaf
Bulgarian Radio Symphony Orchestra, Ivan Drenikov, Jean-Pierre Wallez, Stuttgart Radio Symphony Orchestra, Sir Neville Marriner, Vilmos Fischer, Dimitur Manolov, Sofia Philharmonic Orchestra, Marta Deyanova, Vassil Stefanov & Nikolai Evrov
