This post from Erik Loomis at LGM blog is awesome. I, too, never heard DuBois' voice, and to hear his distinctive enunciation, much in a style that reminds me of FDR, is thrilling. The substance of DuBois analysis is also more true today than it was than in 1960, when he delivered the speech. It is a 19th Century voice speaking truth to the power of the 20th Century.