Coro Del Palacio De Bellas Artes De Mexico

Teresa Pavese

The Cleveland Orchestra Children's Chorus

Jésus Etcheverry

José Todaro

Udvardy Tibor

Jorma Panula

Romano Gandolfi

Francesco Albanese

Boris Christoff

Virgilio Lazzari

Kurt Herbert Adler

L.D.Clements

English Chamber Orchestra Choir

Renato Bruson

Ermanno Wolf-Ferrari

Edita Gruberova

Siegfried Matthus

Thomas Hemsley

Marinus Voorberg

The Metropolitan Opera

Franco Leoni

Lauris Elms

Anneliese Rothenberger

Barbara Troxell