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. 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. The length of the tube is what also has an affect on the pitch.While most brass instruments are in fact made out of brass, there are a few exceptions to the rule as some believe that an instrument should be classed as a brass instrument by the sound they make. Exceptions that are not made out of brass include the serpent and the alphorn. It is often mistaken that the saxophones are members of the brass family, but they are more correctly classed as a woodwind instrument. There are four different types of brass instruments and they are classed into instruments that are known as natural brass instruments, keyed or fingered brass instruments, valved brass and cylindrical bore brass instruments, slide brass instruments and