Energetic songs, made for dancing - try resisting Garnizon Lannuon !
Some RealAudio recordings
Extracts of the first great collection of traditionnal songs, written by Hersart de la Villemarqué, and still a source for contemporary singers (Jenovefa Rustefan, An alarc'h)
   
The simple and deep faith of the Bretons has been expressed in beautiful religious hymns. My favorite : Ar baradoz Sad "gwerzhioł" or light "sonioł", tales of adventures or love songs, famous (Tri martolod, Pardon Spezed) or less famous (Ar werzhid arc'hant) tunes