Not sure what the issue might be...
We had over 25 beta testers, but nobody reported absolutely no sound ...
Computer System sounds ie: beeps, honks, pings etc, are different from music (ie: MP3) playback.
Make sure under system settings for sound playback devices, you have your speakers selected and your sound volume for them is turned UP and not muted. Once that is set, then you click the PLAY (right arrow) on the radio player.
Note: If you don't want to have a separate pop-up player so you can surf the net and read forums while you listen, then you can just select the play button that's embedded in the program schedule page. However, once you leave that page, the radio stops playing.
Regards,
Doug