Aida John Steane introduces music from Verdi's opera, which is shortly to enter the repertory at the Royal Opera House, Covent Garden. He concentrates on the role of Aida herself and in particular on the aria ' 0 Patria Mia ', discussing the quality of voice needed for the part as well as technical and interpretative problems encountered. Among the voices heard are those of Emmy Destinn , Celestina Bon insegna, Rosa Ponselle , Elisabeth Rethberg. Maria Callas and Montserrat Caballe: records (Aida live from Covent Garden: 30 June)