Natalia Troitskaya
Prague Philharmonic Chorus
Elmer Iseler Singers
Krzysztof Penderecki
Eric Fletcher
Chor Der Musikhochschule Saarbrücken
English Bach Festival Chorus
Face Treble Choir
New England Conservatory Chorus
Wolfgang Schubert
Loren Kitt
Wallace Mann
John A. C. Kane
Vesko Eshkenazy
August Messthaler
Marcel Couraud
Bernhard Klee
Carlo Maria Giulini
Kevin Smith
Glen Ellyn Children's Chorus