Have you heard of Hildegard von Bingen or Francesca Caccini?  How about Florence Price or Elizabeth Maconchy?  No?  Most of us know that Clara Schumann was a star as a pianist before she married Robert Schumann, but let's face it the classical repertoire is the history of one great male genius after another.  Acclaimed Australian-born soprano Danielle de Niese thinks it's time to shed some light on the women who have contributed to classical music.  Her documentary, Unsung Heroines: The Lost World of Female Composers, aired this year on the BBC.  It profiled five female composers who were known during their lifetimes but fell into obscurity thereafter.  Hildegard von Bingen was a 12th century nun who revolutionized music with her sacred songs and laid the foundation for Western music.  Two French monks claimed credit for her work.  Francesca Caccini performed at the court of the Medicis in 17th century Florence and was a successful opera composer.  Her talents likely threatened her male counterparts; she was relegated to servant status at the Florentine court.  Florence Price was the first female African-American composer to have a symphony orchestra perform one of her works.  She worked as an organist at silent film screenings to make ends meet after her divorce.  Elizabeth Maconchy was a modernist British composer of string quartets.  She applied for the Royal College of Music's Mendelssohn Scholarship but was denied.  The college decided she would only marry and never write another note.  And, of course, there was Clara.