The Celtic harp (also called folk harp, lever harp and Irish harp) plays a central role in the traditional music of Ireland, Scotland, Wales and parts of France (Brittany). The term “lever harp” refers to the mechanism (or lever) used to shorten the string’s vibrating length and sharpen the note by a half tone, enabling one to change keys. Lever harps (Celtic or folk harps) are smaller, lighter, more portable and much less expensive than classical harps.