Wiener Staatsopernorchester
Roberta Alexander
Singverein Der Gesellschaft Der Musikfreunde
Thomas Schippers
Heather Harper
Helen Watts
Orchestra of the Welsh National Opera
Anna Reynolds
Orchestra dell'Accademia Nazionale di Santa Cecilia
Sheila Armstrong
English Opera Group Orchestra
Felicity Palmer
Gwyneth Jones
Yvonne Minton
Marta Senn
Coro del Teatro dell'Opera di Roma
Otto Gerdes
Julia Hamari
Monte Carlo Opera Choir
Leonardo Monreale