How did Indo-European sound?

Professor Andrew Bryd of the University of Kentucky here recites the fable “The Sheep and the Horses” in reconstructed Proto-Indo-European. This fable was composed in 1868 by the German linguist August Schleicher. Like the words and grammar of PIE, the sounds of the language are a theoretical construct (and must, of course, be taken with a liberal grain of salt):
http://www.huffingtonpost.com/2013/09/28/proto-indo-european-language-ancestors_n_4005545.html