Does anyone else have problems with the Real Audio soundclips on the Musical Traditions website?

My problem is likely to be that I'm on a Mac (Safari browser), but every time I try to play one I get the message that my Real Audio can't play it, and that it will search for software. Then it reports that there is no software that can play it.

Now this is apparently a Real Audio clip, and since nobody seems to have complaints there, others must be able to play them. I have what's as far as I know the latest version of Real Player (the free version), so what's my problem here.

I can listen to Real Audio clips on Amazon, or wherever. Or I can listen to QuickTime clips.

Thanks for any help.