The trombone is an aerophone of the metal family whose invention dates back to the 15th century. Its name derives from the Italian and means big trumpet. It is more low-pitched than the trumpet and sharper than the tuba. It can be compared to the human voice. It integrates, for its versatility, in various musical groups, both erudite and popular.
The trombone has a plunger mechanism, called rod. This part is movable and, using one of the arms, the trombonist can stretch it to six more positions besides the closed piston for a total of seven positions. The valve trombone was built at the beginning of the 18th century, just like trumpets and horns, spreading out in Brazil, in bands and in churches. In addition to belonging to the family of metals, the trombone has its own family, composed by smaller to larger sizes, being the trombones soprano, contralto, tenor and bass.