Sound recordings of folklore from all over the world, collected by folklorist Alan Lomax are now freely available at the Cultural Equity website. The archives include an extensive collection of sound recordings of music, songs, interviews and stories from Ireland and Scotland - amongst others - which have been collected since 1946.
This is an amazing project and there's so much good stuff here! For more on the man himself, there is a good article here that describes his life and works.