From Leonardo’s drawings and writings it emerges that certain of the genius’s main passions ended up being music. Of their numerous inventions, the mechanical drum is probably the absolute most fascinating. There are two drawings of this instrument in Atlantic Code: a pencil design (f. 877r) and a definitive drawing in red pastel (f. 837r). The drum ended up being created for many different occasions, from city parades to armed forces actions. Two big rollers move the batons within edges that overcome the drum, and pegs regarding rollers are moved to set the rhythm.The player can go the drum across the ground, using the wheels activating the rollers, or play it standing nevertheless by turning a handle.