What Leonardo da Vinci invention was an automated drum machine designed to entertain crowds?

Leonardo da Vinci designed a mechanical drum machine to produce rhythmic music automatically. The device used a rotating drum fitted with pegs; as the drum turned, the pegs struck or moved drumsticks in a programmed sequence.

The machine was intended for pageants and public entertainment. Its programmable pattern meant that the rhythm could be changed by altering the arrangement of the pegs, making it an early example of mechanical music control rather than a simple hand-played instrument.

This drum machine is sometimes grouped with Leonardo’s automata because it performed a repeated action without a human musician striking the drum directly. It is also distinct from Leonardo’s famous robotic knight, which used cables and gears to produce human-like movements. The drum device focused on sound and rhythm, not walking.