Sharp, Flat, Natural
In music of the West, the octave is divided into 12 equal parts called half steps, or semitones. In non-Western
music (for example, as in Middle Eastern music), the octave may be divided into 24 units (quartertones). In
some more modern Western music, it may be divided into even smaller units (microtones), as in the 43-unit
music by American composer Harry Partch.
TRACK 52
Listening:
Hindustani jor improvisation on a zither accompanied by a tambura, a drone lute
In Module 1 we discussed the white keys of the piano; in this module we will discuss the black keys. On the
keyboard below, each key is numbered from 1 to 12. Notice that the white keys are separated by black keys
except for E to F (5–6) and B to C (12–1). All adjacentnumbered keys are called half steps (HS). Half steps are
paired white to black keys, or black to white keys, like steps 1–2 or 9–10, except for the two adjacent pairs of
white keys (E to F and B to C).
87
BASICS OF RHYTHM
87 Sharp, Flat, Natural
90 Drawing Accidentals on the Staff
91 Relating Accidentals on the Staff to the Keyboard
92 Enharmonic Spellings
93 Diatonic and Chromatic Half Steps
94 Chromatic Scales
97 Whole Steps
101 Double Sharp, Double Flat
105 Workbook