A music box tune is a melody made by a mechanical musical movement, typically using a rotating metal cylinder or drum with pins that pluck tuned teeth (or lamellae) of a steel comb.

Music boxes make sound through a mechanical device called a "musical movement". A rotating cylinder or drum has pins that, as they rotate, pluck the teeth of a steel comb.

- Cylinder (Drum), A metal round drum with pins,Each pin on the metal drum is with same length, will pluck the comb smoothly.

- Comb,A steel piece with teeth like comb,Each tooth on the metal comb is a different length, creating a unique vibration that produces different notes.

- Play Power, The Windup music box model is with a spring house, The Hand Music Box is with crankshaft,and the automatic music box can be with electric motor

- Base,A Usually use Zinc alloy, and brass for deluxe large musical movement

The musical movement, which is the mechanism behind music boxes, was introduced in 1796, marking the first time people could listen to music in their own homes.

While traditionally,Some professional manufacturer like Sankyo,Yunsheng and Reuge can customize music box tunes for your music box,usually need to offer music file like mid file,mp3 file or staff(sore)

Some popular tunes that are often played on music boxes include "Brahms lullaby", "Love Story", and "Over the rainbow"

PS
Wind up Musical Movemet

Hand Crank Musical Mechanism,