Music notation is a symbolic language that is designed to illustrate the melodic, harmonic, and rhythmic elements of music. Pitch refers to the relative highness or lowness of a performed sound. In western tonal music, these pitches have designated note names C, D, E, F, G, A and B that occur in ascending and descending fashion. In music notation, note symbols are used to describe the particular pitch of a given note. When notating the pitch of a particular note, a musical staff is used to organize the position of each note in correlation to its pitch. These positions on the staff relate to the natural notes of the chromatic scale: A, B, C, D, E, F, and G. Throughout the progression of the natural notes, there is a series of whole and half steps. The amount of steps between two notes is called an interval. The natural half step intervals occur between the E & F notes, and between the B & C notes. The natural half steps that occur between E & F and B & C can be seen by looking at the spacing of the keys on a piano. Notice there is no black key between highlighted notes.