Voice: Vocal Aesthetics in Digital Arts and Media. Edited by Norie Neumark, Ross Gibson, and Theo van Leeuwen. Cambridge, MA: MIT Press, 2010; 440 pp. $40.00 cloth, e-book available. Dramatic Theories of Voice in the Twentieth Century. By Andrew M. Kimbrough. Amherst, NY: Cambria Press, 2011; 334 pp. $114.99 cloth, e-book available