What kind of machine did Leonardo da Vinci design to produce continuous motion for a drum?

Leonardo da Vinci designed a mechanical drum to produce continuous rhythmic motion.

The device used a rotating cylinder fitted with pegs. As the cylinder turned, the pegs contacted levers and caused drumsticks to strike, creating a repeating rhythm. It was a form of automated musical machine rather than a hand-played drum.

Leonardo’s mechanical drum is associated with his studies of automata and entertainment machines. The design shows how a simple programmed sequence could be encoded mechanically: changing the placement of the pegs would change the timing and pattern of the beats.

This invention is sometimes mixed up with Leonardo’s mechanical knight, which used a more complex human-shaped mechanism. Both belonged to his interest in automata, but the drum focused on sound and repetitive motion. Reconstructions have been made from his drawings to demonstrate the principle.