Copyright: Copyright 1998-2005  W3C (MIT, ERCIM, Keio), All Rights Reserved.
See http://www.w3.org/Consortium/Legal/.
Author: Muriel Jourdan (Muriel.Jourdan@ERCIMlpes.fr)
Version: APr. 3, 2000, v1
Module: SMIL Timing & Sync Module
Feature:  begin attribute and Negative Delay
File Name: Negative_Delay2.smil
Media Components: 1 wav
Expected Behavior: The audio start to play at t=2s
but its first three seconds are skipped.
<t:par id="p1" begin="2s">
<t:audio  id="vid" src="../sounds/geminidecho.wav"
begin="p1.begin-3s" />
</t:par>