The high or low quality of the sound is called the pitch of a sound. It is the measure of the loudness of the voice. It defines the grade to which the sound should be produced. Of course, when the different instruments come together the intensity of each instrument becomes important and matters.
This allows the person to claim the different sounds and compose a specific tune of his or her choice. It is important to note the pitch in music as well as many other properties to make sure each instrument sounds the way you want it to sound in the town.