What gives a brass instrument its characteristic sounds

Long metal tubing
A read in the mouthpiece
The use of sticks and mallets
Being placed in the front of the orchestra

The long metal tubing of a brass instrument is what primarily gives it its characteristic sound. The length and shape of the tubing determine the pitch and tone quality of the instrument.

The use of a mouthpiece with a cup-shaped or funnel-shaped opening is also crucial in producing the sound. The player's vibrating lips generate the sound waves, which are then amplified and shaped by the resonance of the tubing.

Unlike woodwind instruments, brass instruments do not use a reed in the mouthpiece. Instead, the player creates the sound by buzzing their lips against the mouthpiece.

The use of sticks and mallets, on the other hand, is common in percussion instruments such as drums and xylophones, and not typically associated with brass instruments.

While brass instruments such as trumpets or trombones may be positioned towards the front of the orchestra, this placement does not directly affect the characteristic sound of the instrument. It is mainly done for practical reasons in order to balance the sound and projection within the ensemble.