You must also see all the spectacular SOHO images of the sun
Several pulsars (another kind of star). These vary depending on how fast they spin.
Black hole sounds
Music incorporating many of these sounds is put out by one of my favorite artists, K.M. Krebs. He releases most of his radio derived work under the name 833-45(the name of a quasar), and the rest under his own name.
This is perhaps one of my favorite recordings ever. However, it's not for everyone.
His blog is wonderful as well. You can contact him directly through his web page. I purchased all his compiled works on one DVD and it was some of the best money I ever spent.