Brass instruments are instruments that are played by the musician
blowing into a tub in order to make a sound. The vibration of the lips
as the player blows into the instrument is what really makes the sound.
Pitch of the sound can also be altered by the player by changing the
pressure from the lips which is put against the mouthpiece. The valves
on these instruments are opened and closed by using the keys pressed by
the player's fingers and these valves are what allow the musician to
alter the sound that is being made. Just like trumpet, tuba, cornet,
baritone horn are generally made with valves.
Brass instruments
are best known for their bold tones and are often used in music to add
power to the overall sound. Some have a rich sound while others can have
more of a sharp sound that cuts through.