You can download a wma (Micorsoft's version of the mp3) of the tune here:
http://tlfscotland.co.uk/sounds.htm

Or listen (stream) to other versions at these sites:
http://www.folkweb.com/davidsurette/
http://www.cdbaby.com/cd/passncon?cdbaby=b1d34f114344548850c610620819d036