Its celebrated soundtrack recorded at RCA studios in Italy was conducted by Rota himself and starred mezzo-soprano Viorica Cortez as well as such other respected opera singers as Daniela Mazzucato Ugo Benelli Alfredo Mariotti Mario Basiola and Giorgio Zancanaro ; it was originally released by RCA and has more recently been available on the Ricordi label ( with Mazzucato's name misspelled ) .