What is the mechanism behind the functioning of a Regina music box?

A Regina music box works through a complex mechanical mechanism involving a metal comb, a cylinder or disc, and a series of pins or bumps. When the music box is wound up, the spring inside stores potential energy which powers the mechanism. As the cylinder or disc rotates, it activates the metal comb, causing a series of tuned teeth to vibrate and produce musical notes. The cylinder or disc of the Regina music box is usually studded with tiny pins or bumps that protrude at different lengths. These pins operate a system of levers and gears that control the movement of the metal comb. As the cylinder or disc rotates, the pins strike the metal comb teeth at specific intervals. The length of the pin determines the duration of the note, while the position of the pin on the cylinder or disc determines the pitch. The vibration of the metal comb teeth, in turn, creates sound waves that resonate through the air and produce music. The complex arrangement of pins and the comb's teeth ensures that different combinations of pins produce different melodies. The size and shape of the comb and the materials it is made of contribute to the unique timbre and quality of sound produced by each Regina music box.