Callas only sang Gilda in Rigoletto in one run of performances, in Mexico City in 1952, and she recorded the role three years later. She moves beyond the girlish tone and sparkling coloratura of the character’s first scenes to create a figure of tragic stature as events unfold. ‘Once heard, this rendering is never likely to be forgotten,’ was Gramophone’s judgement on her interpretation, and the same could apply to Tito Gobbi’s, embodying every aspect of the accursed court jester.