In my last campaign I used songs from the first four Tyrannsaurus Rex albums, many of them used exactly as is. If you had a tape recorder in a fantasy tavern while a couple of half-elf bards were singing/playing... you'd end up with the early Tyrannosaurus Rex stuff.
The campaign had a subplot centred around the search for a legendary bard/sage named Agadinmar. One of the heroes was a young bard and was very interested in finding Agadinmar and/or collecting his tales and songs. They never found him (they backed out of the adventure where he would have been found) but along the way they found lots and lots of his songs, and the songs gave the heroes many clues about the world they were exploring.
ironregime