What Leonardo da Vinci invention was a rotating drum designed to produce a musical rhythm?

Leonardo da Vinci designed a mechanical drum that could produce a repeating musical rhythm.

The drum formed part of a larger mechanical entertainment system associated with Leonardo’s studies of automata. Pegs placed on a rotating cylinder triggered drumsticks, allowing the machine to repeat a programmed pattern. Moving the pegs could change the rhythm, much like changing the control pattern in a later programmable mechanism.

Leonardo’s mechanical music designs show his interest in converting continuous rotary motion into timed actions. That same engineering principle appears throughout his work, including machines for lifting, moving, and striking.

The device was not an electronic drum machine and did not record sound. It generated rhythm mechanically through gears, a rotating cylinder, and striking arms. The surviving reconstruction evidence is connected with Leonardo’s automaton research rather than with a modern musical instrument.