Set Svanholm

Hetty Plumacher (contralto), Set Svanholm (tenor), Kirsten Flagstad (soprano), Ira Malaniuk (contralto), George London (baritone), Eberhard Wächter (baritone), Waldemar Kmentt (tenor), Oda Balsborg (soprano), Vera Schlosser (soprano), Claudia Hellmann (mezzo-soprano), Hans Hotter (bass (vocal)), Berit Lindholm (soprano), Marilyn Tyler (soprano), Vera Little (mezzo-soprano), Helga Dernesch (soprano), Helen Watts (contralto), Brigitte Fassbaender (contralto), Wolfgang Windgassen (tenor), Gerhard Stolze (tenor), Roland Berger (horn), Birgit Nilsson (soprano), Gottlob Frick (bass (vocal)), Wiener Philharmoniker, Sir Georg Solti

George London (Wotan), Kirsten Flagstad (Fricka), Claire Watson (Freia), Set Svanholm (Loge), Waldemar Kmentt (Froh), Eberhard Wächter (Donner), Paul Kuen (Mime), Jean Madeira (Erda), Gustav Neidlinger (Alberich), Walter Kreppel (Fasolt), Kurt Böhme (Fafner) Wiener Philharmoniker, Sir Georg Solti

Bruno Walter, Set Svanholm, New York Philharmonic, Kathleen Ferrier, John Newmark

[b]Das Rheingold[/b] George London (Wotan), Kirsten Flagstad (Fricka), Claire Watson (Freia), Set Svanholm (Loge), Waldemar Kmentt (Froh), Eberhard Wächter (Donner), Paul Kuen (Mime), Jean Madeira (Erda), Gustav Neidlinger (Alberich), Walter Kreppel (Fasolt), Kurt Böhme (Fafner), Oda Balsborg (Woglinde), Hetty Plümacher (Wellgunde), Ira Malaniuk (Flosshilde) [b]Die Walküre[/b] James King (Siegmund), Régine Crespin (Sieglinde), Gottlob Frick (Hunding), Hans Hotter (Wotan), Birgit Nilsson (Brünnhilde), Christa Ludwig (Fricka), Brigitte Fassbaender (Waltraute), Berit Lindholm (Helmwige), Helga Dernesch (Ortlinde), Vera Schlosser (Gerhilde), Helen Watts (Schwertleite), Vera Little (Siegrune), Claudia Hellmann (Rossweise), Marilyn Tyler (Grimgerde) [b]Siegfried[/b] Wolfgang Windgassen (Siegfried), Hans Hotter (Wanderer), Gerhard Stolze (Mime), Marga Höffgen (Erda), Joan Sutherland (Waldvogel) [b]Götterdämmerung[/b] Gottlob Frick (Hagen), Claire Watson (Gutrune), Dietrich Fischer-Dieskau (Gunther), Christa Ludwig (Waltraute), Lucia Popp (Woglinde), Gwyneth Jones (Wellgunde), Maureen Guy (Flosshilde), Helen Watts (Erste Norn), Grace Hoffman (Zweite Norn), Anita Välkki (Dritte Norn) Vienna Philharmonic Orchestra, Vienna State Opera Chorus, Sir Georg Solti

Eileen Farrell (soprano), Set Svanholm (tenor) Leopold Stokowski & his Symphony Orchestra & Rochester Philharmonic Orchestra, Erich Leinsdorf

Set Svanholm (tenor) & Arne Sunegard (piano)

Kerstin Meyer (mezzo-soprano)

Kirsten Flagstad

Kirsten Flagstad (Leonore), Set Svanholm (Florestan), Dezsö Ernster (Rocco), Paul Schöffler (Don Pizarro), Nadine Conner (Marzelline), Peter Klein (Jaquino), Jerome Hines (Don Fernando) Orchestra & Chorus of the Metropolitan Opera, Bruno Walter

Oralia Dominguez (contralto) & Set Svanholm (tenor) Männerchor des Wiener Singvereins & Vienna Symphony Orchestra, Paul Klecki

Kirsten Flagstad (soprano), Lauritz Melchior (tenor), Gordon Dilworth (baritone), Set Svanholm (tenor) Victor Symphony Orchestra, London Philharmonic Orchestra, Edwin McArthur, Karl Bohm, Wilhelm Furtwangler

Set Svanholm (Samson), Blanche Thebom (Dalila), Sigurd Björling (Priest of Dagon), Set Svanholm (Enee), Kerstin Meyer (Didon), Kjerstin Dellert (Cassandra), Barbro Ericson (Anna), Anders Näslund (Chorébe), Arne Tyrén (King Priam), Erik Saedén (Narbal) Royal Swedish Opera Chorus, Royal Orchestra Stockholm, Herbert Sandberg

Birgit Nilsson (Aida), Elisabeth Söderström (Priestess), Sigurd Björling (Amonasro), Leon Björker (The King), Brita Hertzberg (Amneris), Set Svanholm (Radames), Sven Nilsson (Ramfis), Brita Hertzberg (Elsa), Set Svanholm (Lohengrin), Kerstin Löfgren, Elisabeth Söderström or Astrid Ohlson, Ingeborg Kjellgren, Kerstin Meyer (Four Esquires), Einar Beyron (Parsifal), Joel Berglund (Gurnemanz), Margareta Bergström (Kundry) Royal Swedish Opera Chorus & Orchestra, Sixten Ehrling, Nils Grevillius

Astrid Varnay, Gustav Neidlinger, Ernest Blanc, Elisabeth Grümmer, Lauritz Melchior, Set Svanholm Hermann Weigert, Lorin Maazel, Lovro von Matacic, Erich Leinsdorf, Fritz Stiedry

Kirsten Flagstad (soprano), Set Svanholm (tenor) Wilhelm Furtwängler, Gaetano Merola

Lars Rosen (tenor), Helge Brilioth (tenor), Rolf Bjorling (tenor), Sven-Erik Vikstrom (tenor), Ragnar Ulfung (tenor), Birgin Nordin (soprano), Nicolai Gedda (tenor), Per Grunden (tenor), Gosta Bjorling (tenor), Conny Soderstrom (tenor), Arne Ohlson (tenor), Jussi Bjorling (tenor), Einar Andersson (tenor), Set Svanholm (tenor), Aase Nordmo-Lovberg (soprano), Einar Beyron (tenor), Martin Ohman (tenor), David Stockman (tenor), Torsten Vilhelm Lennartsson (tenor), Arvid Odmann (tenor) Stockholm Royal Orchestra, Swedish Radio Symphony Orchestra, Stockholm Philharmonic Orchestra, Swedish Radio Light Orchestra, Stockholm Royal Opera Orchestra, Stockholm Royal Opera Chorus, Stockholm Royal Chorus, Swedish Radio Orchestra, Stig Westerberg, Gunnar Staern, Lennart Hedwall, Egon Kjerrman, Herbert Sandberg, Sixten Ehrling, Lamberto Gardelli, Issay Alexandrovich Dobrowen, Fritz Busch, Nils Grevillius, Adolf Wiklund

Set Svanholm (tenor), Kirsten Flagstad (soprano), Arnold van Mill (bass (vocal)), Wiener Philharmoniker, Hans Knappertsbusch

Oda Balsborg (soprano), Gustav Neidlinger (bass), Ira Malaniuk (contralto), Hetty Plumacher (contralto), Kirsten Flagstad (soprano), Claire Watson (soprano), Kurt Böhme (bass), Walter Kreppel (bass), Waldemar Kmentt (tenor), George London (bass-baritone), Eberhard Wächter (baritone), Paul Kuentz (bass, tenor), Set Svanholm (tenor), Jean Madeira (mezzo-soprano), Wiener Philharmoniker, Sir Georg Solti

Kirsten Flagstad & Set Svanholm Philharmonic Orchestra, Clemens Krauss

Kirsten Flagstad, Gerald Moore, Set Svanholm & Elisabeth Höngen Issay Dobrowen, Wilhelm Furtwängler & Georges Sébastian

Kjerstin Dellert (soprano), Per Grundén (tenor), Arne Hendriksen (tenor), Eva Prytz (soprano), Ingvar Wixell (baritone)

Kirsten Flagstad (soprano), Set Svanholm (tenor), Birgit Nilsson (soprano), Grace Hoffman (mezzo-soprano), Wiener Philharmoniker, Sir Georg Solti, Hans Knappertsbusch

Jussi Björling (tenor), Maggie Teyte, Enrico Caruso (tenor), Rosa Ponselle (soprano), Riccardo Stracciari, Dame Nellie Melba (soprano), Philippe Gaubert, Landon Ronald, Vienna Philharmonic, Bruno Walter, Kathleen Ferrier (contralto), Leonard Bernstein, Jennie Tourel (mezzo-soprano), Richard Tauber (tenor), Ferruccio Tagliavini (tenor), Pia Tassinari, Beniamino Gigli (tenor), Mario Basiola, Giuseppe Nessi, Leone Paci, Kirsten Flagstad (soprano), Licia Albanese (soprano), Giuseppe di Stefano (tenor), George Reeves, Elisabeth Schumann (soprano), Set Svanholm (tenor), Feodor Chaliapin (bass), Olive Kline, Lotte Lehmann (soprano), Erna Berger (soprano), Frida Leider (soprano), Victor Symphony Orchestra, Edwin McArthur, Lauritz Melchior (tenor), Ezio Pinza (bass), Renata Tebaldi (soprano), Stockholm Symphony Orchestra, Victor Orchestra, Metropolitan Opera, Milan La Scala Chorus, Teatro alla Scala, Philharmonia Orchestra, Nils Grevillius, Franco Ghione, Rosario Bourdon, Josef Krips, Sir John Barbirolli

Kirsten Flagstad, Set Svanholm San Francisco Opera Orchestra, San Francisco Opera Company Women's Chorus, Gaetano Merola

Set Svanholm (tenor), Margareta Bergström, Sigurd Björling, Leon Björker, Einar Andersson, Georg Svedenbrant, Arne Ohlson, Sven-Erik Jacobsson, Anna-Greta Soderholm, Elisabeth Söderström (soprano), Arne Wirén, Margareta Bakker-Sunnegardh, Kjerstin Dellert, Hjordis Schymberg, Carrie Nilsson, Ingvar Wixell (baritone), Sven-Erik Vikstrom, Kerstin Meyer, Eva Prytz, Arne Tyren, Conny Soderstrom, Joel Berglund, Royal Orchestra, The and Sixten Ehrling, Birgit Nilsson (soprano), Royal Swedish Opera Chorus, Royal Swedish Orchestra, Royal Opera Chorus, The, Sixten Ehrling

Set Svanholm (tenor), Florence Widgren (vocals), Inge-Gerd Norlin (vocals), Hjordis Schymberg (soprano), Birgit Nilsson (soprano), Elisabeth Soderstrom (soprano), Sigurd Bjorling (baritone) Swedish Radio Orchestra, Stockholm Royal Orchestra, Swedish Radio Symphony Orchestra, Herbert Sandberg, Nils Grevillius, Sixten Ehrling, Lars-Erik Larsson, Tor Mann

Set Svanholm (tenor), Kirsten Flagstad (soprano), Arnold van Mill (bass (vocal)), Wiener Philharmoniker, Hans Knappertsbusch

Hertha Glaz, Thomas Haysward, Hans Hoffer, Set Svanhlom, Astird Varnay New York Metropolitan Opera Orchestra and Chorus, Fritz Reiner

Ljuba Welitsch (Salome), Hans Hotter (Jochanaan), Set Svanholm (Herodes), Elisabeth Höngen (Herodias) & Brian Sullivan (Narraboth) Metropolitan Opera, Fritz Reiner

Set Svanholm (Rienzi), Anne Lund Christiansen (Irene), Paul Schöffler (Steffano), Christa Ludwig (Adriano), Walter Berry (Paolo), Teresa Stich-Randell (Ein Friedensbote), Karl Terkal (Baroncelli), Alois Pernerstorfer (Cecco del Vecchio), Heinz Holecek (Raimondo) Vienna Symphony Orchestra, Josef Krips

Royal Swedish Academy of Music Choir, Nils Grevillius, Armas Järnefelt, Wilhelm Peterson-Berger

Birgit Nilsson (Brünnhilde), Sigurd Björling (Wotan), Set Svanholm (Siegmund), Aase Nordmo-Lövberg (Sieglinde), Sven Nilsson (Hunding), Kerstin Meyer (Fricka/Rossweise), Kjerstin Dellert (Helmwige), Elisabeth Söderström (Ortlinde), Anna-Greta Söderholm (Gerhilde), Ingeborg Kjellgren (Waltraute), Bette Wermine-Björling (Siegrune), Margareta Bergström (Grimgerde), Margit Sehlmark (Schwertleite) Royal Swedish Opera Orchestra, Sixten Ehrling

Kirsten Flagstad (Isolde), Set Svanholm (Tristan), Ludwig Weber (King Mark), Viorica Ursuleac (Brangäne), Hans Hotter (Kurwenal) & Angel Mattielo (Melot) Teatro Colón Chorus & Orchestra, Erich Kleiber

Astrid Varnay (Isolde), Set Svanholm (Tristan), Jerome Hines, Georges Thebom, Josef Metternich Metropolitan Opera, Rudolf Kempe

Julius Patzak (tenor), Ludwig Suthaus (tenor), Ferdinand Frantz (bass-baritone), Alois Pernerstorfer (bass-baritone), Josef Greindl (bass), Rita Streich (soprano), Margarete Klose (mezzo-soprano), Martha Mödl (soprano), Set Svanholm (tenor), Kirsten Flagstad (soprano), Rainer von Zastrow (piano), Orchestra Sinfonica di Roma della RAI, Teatro alla Scala, Wilhelm Furtwängler

Royal Swedish Opera, Sten-Ake Axelson, Leo Blech

Kirsten Flagstad (Brünnhilde), Set Svanholm (Siegfried), Egil Nordsjø (Hagen), Per Gronnenberg (Alberich), Ingrid Bjoner (Gutrune/Dritte Norn), Eva Gustavson (Erste Norn), Waldemar Johnsen (Gunther), Unni Bugge-Hanssen (Woglinde), Karen Flagstad (Wellgunde/Zweite Norn), Beate Asserson (Flosshilde) Oslo Philharmonic Orchestra & Norwegian State Radio Orchestra, Øivin Fjeldstad

Astrid Varnay, Set Svanholm, George London, Hans Hotter, Lawrence Davidson, Luben Vichegonov Metropolitan Opera, Fritz Stiedry

Kirsten Flagstad, Set Snavholm, Egil Nordsjø, Eva Gustavson, Karen Marie Flagstad, Ingrid Bjoner, Waldemar Johnsen, Set Svanholm The Oslo Philharmonic Orchestra, Orchester Der Stadtischen Oper, San Francisco War Memorial Opera Association Orchestra, The Norwegian State Opera Orchestra & Chorus, Øivin Fjelstad, Georges Sebastian, Gaetano Merola

February 22, 1941 broadcast: Kirsten Flagstad (Leonore), René Maison (Florestan), Julius Huehn (Don Pizarro), Alexander Kipnis (Rocco), Marita Farell (Marzelline), Karl Laufkoetter (Jaquino), Herbert Janssen (Don Fernando). March 10, 1951 matinee broadcast: Kirsten Flagstad (Leonore), Set Svanholm (Florestan), Dezsö Ernster (Rocco), Paul Schöffler (Pizarro), Nadine Conner (Marzelline), Peter Klein (Jaquino), Jerome Hines (Fernando) Metropolitan Opera, Bruno Walter

Günther Treptow (Siegfried), Gertrude Grob Prandl (Brünnhilde), Ludwig Weber (Hagen), Alberich (Adolf Vogel), Karl Kamann (Gunther), Hilde Konetzni (Gutrune - Acts One & Two/Dritte Norn), Judith Hellwig (Gutrune - Act Three), Rosette Anday (Waltraute/Erste Norn), Georgine von Milinkovic (Zweite Norn), Elisabeth Rutgers (Woglinde), Martha Rons (Wellgunde), Sieglinde Wagner (Flosshilde), Set Svanholm (Siegfried), Egmont Koch (Gunther), Friedrich Dalberg (Hagen), Marta Fuchs ((Brünnhilde), Else Fischer (Gutrune) Wiener Symphoniker, Chorus and Orchestra of Bayreuth Festival, Rudolf Moralt, Karl Elmendorff

Gustaf Sjoberg (bass), Christian Rasch (tenor), Sigurd Pelle Juslen (baritone), Gustaf Nordqvist (organ), Set Svanholm (tenor), Hanser Lina Goransson (soprano), Catarina Carlstedt (organ), Oskar Lindberg (piano), Ingvar Sahlin (organ), Hartvig Sjorin (piano), Gosta Bjorling (tenor), Alf Linder (organ), Henry Lindroth (organ), Rut Jacobsson (soprano), Rune Ede (organ) Westerby Sangforening, Schwedisches Damen Quintet, Thalias Tjanare, Kungliga Operakoren, Sallskapet Muntra Musikanter, Bellmanskoren, Orphei Drangar, Salvation Army, members, Krigsskolans Blandade Kor, Helsingborg Choral Society, Svensk-Amerikanska Sangar, Fredrik Asberg, Edvard During, Erik Akerberg, Max Strandberg, Axel Stenius, Ivar Hedenblad, Klaus Ostby, Anna Ring, Birger Hildestrand, Ernst Francke, Carl Sylvan, Hugo Alfven, Emil Carelius, Hjalmar Johansson, Nils Sjoblom, David Ahlen, Bengt Carlsson, B

Kirsten Flagstad (soprano), Set Svanholm (Siegfried), Ludwig Suthaus (Tristan), Blanche Thebom (Brangane)

Hans Hotter (bass), Gwyneth Jones (soprano), Sieglinde Wagner (contralto), Gundula Janowitz (soprano), Lauritz Melchior (tenor), Leonie Rysanek (soprano), Annelies Kupper (mezzo), Wolfgang Windgassen (tenor), Josef Greindl (bass), Dietrich Fischer-Dieskau (baritone), Leo Slezak (tenor), Astrid Varnay (soprano), Hertha Töpper (mezzo), Kim Borg (bass), Birgit Nilsson (soprano), Karin Branzell (contralto), Josef von Manowarda (bass-baritone), Maria Müller (soprano), Frida Leider (soprano), Kirsten Flagstad (soprano), Set Svanholm (tenor), Max Lorenz (tenor), Fritz Soot (tenor), Jess Thomas (tenor), Friedrich Schorr (bass-baritone), Theodor Scheidl (bass-baritone), James King (tenor), Thomas Stewart (bass-baritone) Bayreuth Festival Chorus and Orchestra, Orchester der Bayreuther Festspiele

Rose Bampton (Daphne), Set Svanholm (Apollo), Anton Dermota (Leukippos), Ludwig Weber (Peneios), Lydia Kindermann (Gaea), Angelo Mattiello (First Shepherd), Umberto di Toto (Second Shepherd) Orchestra & Chorus of the Teatro Colon, Erich Kleiber

Elena Nikolaidi (mezzo), Set Svanholm (tenor) New York Philharmonic Orchestra, Bruno Walter

Herbert Janssen, Fred Destal, Set Svanholm, Elsa Cavelti, Nilda Hofmann, Angel Mattiello, Humberto di Toto, Roberto Maggiolo, Jorge Danton, Emanuel List, Lydia Klindermann, Amanda Cetera, Clara Cyuela, Norma Palmieri Teatro Colon Buenos Aires Orchestra, Erich Kleiber

Christel Goltz (soprano), Ilona Steingruber (soprano), Eleanor Steber (soprano), Set Svanholm (tenor), Otto Wiener (bass baritone) Karl Böhm, James Levine

Set Svanholm, Birgit Nilsson & Josef Greindl NDR Sinfonieorchester, Schmidt-Isserstedt

Kirsten Flagstad, with Set Svanholm, with Constance Shacklock, Set Svanholm Philharmonia Orchestra, Warwick Braithwaite, Anatole Fistoulari, Walter Susskind, Karl Böhm

Alois Pernerstorfer (baritone), Sieglinde Wagner (alto), Margret Weth-Falke (alto), Magda Gabory (soprano), Angelo Mattiello (baritone), Albert Emmerich (bass), Ferdinand Frantz (bass-baritone), Elisabeth Hongen (contralto), Ludwig Weber (bass), Joachim Sattler (tenor), Margareta Kenney (mezzo-soprano), Gunther Treptow (tenor), Emil Markwort (tenor), Walburga Wegener (soprano), Kirsten Flagstad (soprano), Dagmar Schmedes (soprano), Hilde Konetzni (soprano), Ilona Steingruber (soprano), Polly Batic (mezzo-soprano), Karen Marie Crkall (soprano), Set Svanholm (tenor), Josef Herrmann (baritone), Julia Moor (soprano), Peter Markwort (tenor), Joseph Hermann (bass), Max Lorenz (tenor) Milan La Scala Orchestra, Milan La Scala Chorus, Wilhelm Furtwangler

Jan Dahmen (violin), Max Zimolong (horn), Margarete Teschemacher (soprano), Elisabeth Höngen (alto), Torsten Ralf (tenor), Josef Herrmann (baritone), Chor der Staatsoper Dresden (chorus), Max Strub (violin), Walter Gieseking (piano), Lubka Kolessa (piano), Edwin Fischer (piano), Wilhelm Backhaus (piano), Wolfgang Schneiderhan (violin), Torsten Ralf (Otello), Josef Herrmann (Iago), Torsten Ralf (Johnson), Christel Goltz (soprano), Josef Herrmann (Hans Sachs), Esther Rethy (Sophie), Elisabeth Höngen (Octavian), Margarete Teschemacher (Daphne), Torsten Ralf (Apollo), Hans Hermann Nissen (Hans Sachs), Sven Nilsson (Veit Pogner), Eugen Fuchs (Sixtus Beckmesser), Arno Schellenberg (Fritz Kothner), Torsten Ralf (Walther von Stolzing), Martin Kremer (David), Margarete Teschenmacher (Eva), Helene Jung (Magdalena), Rudolf Dittrich (Kunz Vogelgesang), Robert Büssel (Konrad Nachtigall), Klaus Hermanns (Ulrich Eisslinger), Rudolf Schmalnauer (Balthasar Zorn), Hanns Lange (Augustin Moser), Ludwig Eybisch (Hermann Ortel), Hermann Greiner (Hans Schwarz), Serge Smirnoff (Hans Foltz), Chor der Dresdener Staatsoper (chorus), Elisabeth Schwartzkopf (Liù), Set Svanholm (Siegmund), Kirsten Flagstad (Brunnhilde), Set Svanholm (Tristan), Margueritte Teschemacher (Isolde) Sächsische Staatskapelle Dresden, Berliner Philharmoniker, Wiener Philharmoniker, Philharmonia Orchestra, Karl Böhm

Kirsten Flagstad (soprano), Set Svanholm (Siegmund), Edwin McArthur (piano) Wiener Philharmoniker, Oslo Philharmonic Orchestra, Norwegian State Radio Orchestra, London Symphony Orchestra, London Philharmonic Orchestra, Hans Knappertsbusch, Sir Adrian Boult, Sir Georg Solti, Øivin Fjeldstad

Erna Berger (soprano), Lucine Amara, Herta Glaz, Lawrence Davidson, Margaret Harshaw, Hans Hotter (bass-baritone), Jarmila Novotná, Jerome Hines (baritone), Dezső Ernster, Brian Sullivan, Osie Hawkins, Set Svanholm (tenor), Margret Harshaw, Margaret Hars, Leslie Chabay, Brian Sul, Karin Branzell, Günther Treptow (tenor), Astrid Varnay (soprano), Luben Vichey, Ferdinand Frantz (bass-baritone), Kirsten Flagstad (soprano), Blanche Thebom (mezzo-soprano), Thelma Votipka, Regina Resnik (mezzo-soprano), Jeanne Palmer, Jean Madeira (mezzo-soprano), Irene Jessner, Lucielle Browni, Martha Lipton, Lucielle Browning, Jean Made, Herta Glaz (, Peter Klein (tenor), Gerhard Pechner, Helen Traubel (soprano), Magaret Harshaw, Herbert Janssen, Deszö Ernster, Chorus and Orchestra of the Metropolitan Opera House, Fritz Stiedry, Set Svanholm and Mannen, Mannen and Herbert Janssen, Orchestra of the Metropolitan Opera House, Mannen, Chorus

Soloists, Jan Preece, Sena Jurinac (soprano), Deszö Ernster, Birgit Nilsson (soprano), Grace Hoffmann (mezzo-soprano), Kirsten Flagstad (soprano), Set Svanholm (tenor), Arnold van Mill (bass), Paul Schöffler (bass-baritone), Hilde Gueden (soprano), Günther Treptow (tenor), Karl Dönch, Wolfgang Windgassen (tenor), George London (bass-baritone), Hermann Uhde (baritone), Martha Mödl (soprano), Jess Thomas (tenor), Gustav Neidlinger (bass-baritone), Irene Dalis (mezzo-soprano), Maria Reining, Hans Knappertsbusch