A brass instrument, being a musical instrument, works on the principle of resonance. The vibration of the lips as the player blows into the instrument is what really makes the sound. This type of instrument is provided with valves for changing the pitch of the sound being produced. Pitch of the sound can also be altered by the player by changing the pressure from the lips which is put against the mouthpiece.
Tuba is the largest and heavier of all brass instruments and used as a part of marching bands. Trumpets are among the oldest and have three piston valves. Trumpet was used by some of the classical players. Baritone is a male voice brass instrument. This class of musical instruments provides exotic, romantic kind of music comfortably. They are the most commonly used instruments due to their perfection.