In previous modules, you have only seen accidentals when dealing with the raised and lowered versions of 6̂ and 7̂ in the minor mode. In this module, accidentals can and will appear in both major and minor keys and on virtually any scale degree. The notes that are altered by accidentals will be referred to as chromatic, as opposed to those that are diatonic (those seven pitches that are specified by the key signature). Because this is an introduction to chromaticism, the chromatic pitches in this module will be restricted to those that are both approached and left by step. Example 6.1 includes one such pitch, a chromatic neighbor tone. As you can see, the defining feature of the chromatic neighbor tone is that it embellishes a diatonic note by stepping away from it and then right back.