Madeleine Grey ( 11 June 1896 -- 13 March 1979 ) was a French classical singer whose voice is usually described as soprano .
Which also encompassed a mezzo - soprano repertoire .
Madeleine Grey ( 11 June 1896 -- 13 March 1979 ) was a French classical singer whose voice is usually described as soprano but which also encompassed a mezzo - soprano repertoire .