 Caruso biographers Pierre Key, Bruno Zirato and Stanley Jackson attribute Caruso's fame not only to his voice and musicianship but also to a keen business sense and an enthusiastic embrace of commercial sound recording, then in its infancy.Many opera singers of Caruso's time rejected the phonograph (or gramophone) owing to the low fidelity of early discs.Others, including Adelina Patti, Francesco Tamagno and Nellie Melba, exploited the new technology once they became aware of the financial returns that Caruso was reaping from his initial recording sessions.