Pitchfork has made a fine two-part video of Steve Reich's appearance at the SXSW festival in Austin, TX last year, with commentary from Sonic Youth's Thurston Moore, members of So Percussion, and, of course, the precisely loquacious composer. Part 1 is above, Part 2 is here; don't miss a cameo by Hanson at the end. (Via NewMusicBox.)
Update: In the video Reich describes his life-changing encounter with A. M. Jones's Studies in African Music. The composer David Bruce points out that you obtain a copy of Jones's book at the Internet Archive (Volume 1, Volume 2). Bruce has a premiere at Le Poisson Rouge in NYC on Jan. 28.