Brass Instrument: Trumpet, Trombone, French Horn, Low Brass
Introduction to Brass Instruments 
A modern orchestral brass section usually consists of four horns, two trumpets, three trombones, and a tuba, . Brass instruments -- which were originally used in hunting, for military functions or on religious occasions--became regular members of the orchestra in the 18th century, when court orchestras called on the resources of the military bands attached to the same household.

