           Copyright: Copyright 1998-2001 W3C (MIT, INRIA, Keio), All Rights Reserved.
    See http://www.w3.org/Consortium/Legal/.
    Author: Geoff Freed, WGBH/NCAM
               Version: Mar. 13, 2001, v3
                Module: Content Control Module
               Feature: systemAudioDesc test attribute
             File Name: systemAudioDesc.smil
      Media Components: 2 JPG, 2 WAV
     Expected Behavior: show image;
                        play audio descriptions from a single source file containing
                          descriptions and appropriately timed intervals of silence.