No Audio, but Text on signs in game and on Youtube link below, this is not a beginner project.
See youtube link for all the details Kovona posted with the VOD at http://youtu.be/zpGWNJf_QsA snippet below:
Published on Mar 25, 2012 by kovona I been at it again...pushing the envelope of TNT mastery for the challenge and insane fun of it. This is my finest creation and work in progress yet. WORLD SAVE FILE - If you want to try it out: https://rapidshare.com/files/1288777336/Munition_Testing_Area.zip Just unzip and plop it into your minecraft save folder.