John Williams is a movie legend known for his orchestral masterpieces, but he also uses rare instruments for specific 'magical' textures. In the 'Harry Potter' series, particularly 'Hedwig’s Theme,' the 'twinkling' sound is famously associated with the Celesta. However, for more intimate, 'dusty' moments in the wizarding world, Williams and subsequent composers used the Dulcitone. Invented in the 1860s, the Dulcitone is a keyboard instrument that strikes tuning forks with felt hammers. It has a much softer, more bell-like and organic sound than a piano or celesta. It was used to represent the antiquity of Hogwarts and the gentle mystery of magic. Because Dulcitones are rare and easily go out of tune, their fragile sound perfectly complemented the theme of a hidden, ancient world coexisting with our own.