"Worlds of Sound: The Story of Smithsonian Folkways" -- author Richard Carlin discusses his book and the life of Moses Asch and his and larger-than-life dream -- to document and record all the sounds of his time. From 1940 until his death in 1986, Asch -- with the help of collaborators ranging from the eccentric visionary Harry Smith to academic musicologists -- created more than 2000 albums, a sound-scape of the contemporary world still unequaled in breadth and scope. Recorded at NPG, August 10, 2011.