Sound for countdown timer

[alex]

I'm trying to get sound working for a general purpose countdown timer
that can be set for hours, minutes, and seconds.  It offers a variety of
sounds that you can choose from to indicate the end of countdown.  The
counter works in Windows or Linux.  I want to use it in UBUNTU.


The counter works _online_ and you can access it directly without
downloading at:

             http://timberfrog.com/countdown/
       

In my case, the timer can be set and works counts down fine but that I don't have
any sound  neither the test nor end of countdown, so I need help in setting up the sound.

Help, please......
alex