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Rosa Mannion
Amanda Roocroft
Members of the Netherlands Wind Ensemble
Peter van der Bilt
Elisabeth Cooymans
Stephan Genz
Reinhard Peters
Vienna Haydn Orchestra
Bernhard Klee
Ervin Lukacs
Hungarian Opera Orchestra
Sylvia Sass
Bulgarian National Choir
Nicolai Gedda
Irmgard Seefried
Gabriele von Baumberg
Monique Simon
