text: Jeanne Marie-Madeleine Demessieux ( February 13 , 1921 -- November 11 , 1968 ) , was a French organist , pianist , composer , and pedagogue .
simplified: Jeanne Demessieux ( born Montpellier , France , 13 February 1921 ; died Paris , 11 November 1968 ) , was a French organist and composer .