Marian Anderson from WNYC's Soundcheck by listenerservices@wnyc.org (WNYC, New York Public Radio)

2009 marked the 70th anniversary of Marian Anderson's historic performance on the steps of the Lincoln Memorial. Today, we look at her legacy -- as a civil rights figure and as a singer -- with African American opera star Denyce Graves and Raymond Arsenault, author of the book The Sound of Freedom. The podcast will be posted on this WNYC webpage, shortly.