Dear RonanThe simplest course is to download the DT database, following the instructions you'll find on this site, then open the vast compendium up on your hard drive. More than half of the 6000+ songs in the database have synthesized rendtitions of their melodies you can play directly from your computer. Sound quality will not rival the Chieftans live at Carnegie Hall, but you'll get a decent idea of the tune.
The procedure is simple and painless - and the results are very rewarding.
A good time, too, to commend the good folks at DT who have done all of us a great service. To Dick Greenhaus and company, many thanks!