If you are having trouble hearing this audio on a MAC, you should be able
to download a free version of Windows Media Player for MACs at this URL:
http://www.apple.com/downloads/macosx/video/windowsmediaplayerformacosx.html
When you click on the microphone icon for a specific event your MAC
should prompt you with the following message:
"Would you like to open with WMP?"
You should select "YES". From there windows media player will open
and the webcast should play.
If this is real audio for the Mac, you can download the latest revision from RealPlayer for Mac OS X .