Sofía Cancino de Cuevas first quartet for strings, catalogued as Op. 1. In 1940, she received an honorable mention for her symphonic poem "El gallo en Pátzcuaro" for orchestra and male choir, in a contest organized by UNAM. In 1941 she directed the presentation of Mozart's "Don Giovanni" at the Arbeu theater, with the participation of singers (baritone), Carlos Mejía (tenor), and Margarita Cueto (soprano), among others. This made her Mexico's first female conductor. In 1944 she founded the Opera School, with which she conducted "La serva padrona" by Giovanni Battista Pergolesi, "Bastien und Bastienne" by Wolfgang Amadeus Mozart, and "Il matrimonio segreto" by
The New Opera Theatre with I Cantori di New York, "Dido and Æneas", with Thaïs St Julien as Dido and Susannah Waters as Belinda, with Bart Folse conducting. The production was first seen at New York City's Symphony Space, then in New Orleans. In 1989, The NOT presented the New Orleans premiere of "Pelléas et Mélisande" (with Tracey Mitchell as Mélisande), which was followed by "Bastien und Bastienne", and the world-premiere of Dr LaBruyère's "Everyman", after the mediaeval Morality Play. The New Opera Theatre's final presentation was of a Benefit Concert, in the fall of 1989, featuring Natalia Rom. Folse and Morgan went on