Music of the stars?

While browsing the interweb i came across this news article on the bbc website talking about the sound made by the stars.  http://news.bbc.co.uk/1/hi/7687286.stm i find it quite a remarkable idea as sound cannot travel in a vacuum but they so the scientists look at the oscillations from the light of distant stars and convert that back into a sound that we can recognise.  I find it fascinating that different planetary objects make sounds that differ from one to the other depending on things such as size, age and chemicals.