Nadia Boulanger is revered as one of the most influential musicians of the 20th century. She was a composer, conductor and performer of note, yet it is in her work as mentor to the century's greatest musicians -from Aaron Copland to Quincy Jones , Phillip Glass to Michel Legrand - that her true legacy lies. A quarter of a century after her death, her former pupil and friend
David Wilde looks back at her life. Producer Johannah Smith