To view and play the music you need a browser extension called 'Scorch'. If you have not already installed it then click one of these links to download and install Scorch:
If you are on Windows, then after installing Scorch, you will need to re-load this page in Internet Explorer not another web browser. If you don't know how to find Internet Explorer, click the 'Start' menu and start typing "Internet Explorer". Then press your Enter key and browse to this website again.