The term CORRECT THE PITCH OF can be summarized as the job of tuning. Tuning is the process of adjusting the pitch of a musical instrument or voice to match a desired sound. It is an important part of playing music, as it ensures that all instruments and voices are in harmony with each other. Tuning is done by adjusting the tension of the strings, the length of the strings, or the position of the frets on the instrument. It is also done by adjusting the vocal cords and the shape of the mouth when singing.