Angelina Jolie never expected to hit all the notes. But finding the breath of Maria Callas was enough to bring things out of Jolie that she didn’t even know were in her.

The important thing to know going into “Maria” is that it’s the third in a trilogy of films directed by the Chilean whirlwind Pablo Larraín that seek to recover the women behind the plaster saints of 20th-century iconography.

To the generations of opera singers that came after her, she’s still an era-defining consummate artist. “She’s an icon. There’s no other way to put it,” said bass Morris Robinson, who recently sang the role of Ramfis in “Aida” with Boston Lyric Opera.