Sophie Koch

French Mezzo-Soprano

Heinz Wallberg

German Conductor and Composer

Hermann Uhde

German Operatic Baritone

Erich Kunz

Austrian Baritone and Opera Singer

James King

Vilém Přibyl

Czech Operatic Tenor

Enzo Dara

Italian Opera Bass-Baritone

Wolfgang Koch

German Baritone Opera Singer

Aage Haugland

Danish Opera Singer

Felicity Palmer

British operatic mezzo-soprano and soprano

Coro Di Milano Della RAI

Italian Radio Symphony Choir of Milan

Paul Schöffler

Austrian Operatic Baritone

Anneliese Rothenberger

German Operatic Soprano

De Nederlandse Opera

Dutch Opera Company

Giuseppe Patanè

Italian Opera Conductor

Marco Armiliato

Italian Opera Conductor

Sumi Jo

South Korean Soprano

Aldo Protti

Italian baritone opera singer

Michele Pertusi

Italian Operatic Bass

Falk Struckmann

German Operatic Bass-Baritone

Josef Metternich

German Baritone Opera Singer

Maurice Ravel

French Impressionist Composer

Sergei Prokofiev

Russian Classical Composer and Pianist

Sergei Vasilyevich Rachmaninoff

Russian Romantic Composer and Pianist

Arnold Schoenberg

Austrian Composer and Music Theorist

Marc Antoine Charpentier

Baroque French Composer and Musician

Luigi Cherubini

Italian Classical Composer and Musician

ORF Radio-Symphonieorchester Wien

Austrian Radio Symphony Orchestra

Hans Pfitzner

German Romantic Composer and Conductor

Rundfunkchor Berlin

German Concert Choir

Andrea Bocelli

Italian tenor and crossover artist

Concentus Musicus Wien

Austrian Baroque Ensemble

Roberta Invernizzi

Italian Baroque Soprano

Mahler Chamber Orchestra

International Chamber Orchestra Ensemble

Léo Delibes

French Romantic Composer

Frank Beermann

German Conductor and Music Director

Barbara Hannigan

Canadian Soprano and Conductor

National Philharmonic Orchestra

Renowned Symphony Ensemble

Coro Della Radio Televisione Della Svizzera Italiana

Swiss Italian Radio Television Choir

Myung-Whun Chung

South Korean Conductor and Pianist

Simone Young

Australian Conductor and Opera Director

Ewa Podleś

Polish Operatic Contralto

Arnold Schoenberg Chor

Austrian Chamber Choir

Marc Minkowski

French Conductor and Baroque Music Specialist

Bertrand De Billy

Austrian Conductor

Camilla Nylund

Finnish Operatic Soprano

Stephen Stubbs

Baroque Lutenist and Conductor

Marilyn Horne

Celebrated American mezzo-soprano opera singer

Alessandro De Marchi

Italian Conductor and Harpsichordist

Della Jones

Welsh Mezzo-Soprano Singer

Bertolt Brecht

Influential German Playwright and Poet

Agnes Baltsa

Greek Mezzo-Soprano Opera Singer

Peter Mikuláš

Slovak Opera Bass Singer

Alastair Miles

British bass opera singer

Orchestra Sinfonica Di Torino Della RAI

Italian Radio and Television Symphony Orchestra

Josef Krips

Austrian Conductor and Violinist

Michelle DeYoung

Grammy Award-Winning Mezzo-Soprano

Giuseppina Bridelli

Italian Mezzo-Soprano

John McCormack

Irish Tenor and Recording Artist

Jean-Claude Malgoire

French Conductor and Baroque Music Specialist