My partner doesn't pay much attention to opera. But one night when I had listened to Caballé singing Tosca, I came upstairs and he said "who WAS that woman singing?!" It's happened with very few singers: Caballé, Sutherland, and Corelli.
Caballé's Tosca can be considered a modern Tosca . Less dramatic that of Callas and Tebaldi through of feminine fragility and also because her kind of voice .In Scarpia's confrontation she doesn't dialogue face to face with him
Wonderful indeed, which ends in this exquisite dying voice, she's inimitable in that. (The passaggio on "Signore" was a bit problematic though, but... That's ok.)