Real Audio sound tracks play via the excellent RealOnePlayer,
which you can get absolutely free by clicking
HERE .
Be sure and click the words 'Free RealOnePlayer' in underlined blue
and not the flashing FREE - DOWNLOAD NOW in red
- which refers to a free 14-day trial of another product.
Follow the instructions to install RealOnePlayer to your system
and it then runs automatically when you click the playable samples.