Other links mentioned above include:
Audio Samples of Prehistoric Music Ireland
Simon's book, Prehistoric Music of Ireland
And since we are talking about our music, don't forget about Morgan Casey and Nick Wylie, who created and performed the absolutely amazing soundtrack you hear now every time you load up EB! We still get chills hearing that horn when the menu screen comes into view.
(Note: If you are having trouble seeing the image above with the announcement in it, try this backup announcement image.)