Chromatic circle "discrete" structure, and there is no obvious way to assign pitch classes to each of its points. A pitch constellation is a graphical representation of pitches used to describe musical scales, modes, chords or other groupings of pitches within an octave range. It consists of a circle with markings along the circumference or lines from the center which indicate pitches. Most pitch constellations use of a subset of pitches chosen from the twelve pitch chromatic scale. In this case the points on the circle are spaced like the twelve hour markings on an analog clock where each tick mark represents
Jazz scale and B are blue notes. The harmonic minor scale is also of value to many improvisors, as it provides an alternative color for many common chords and chord progressions. An example is C-D-E-F-G-A-B-C. The C harmonic minor scale can be used on the chords of a piece in C minor, especially on the minor ii V7 i chord progression. One of the most common uses of the harmonic minor scale is its fifth mode, which is a frequently-heard sound over dominant chords. The altered dominant scale, also loosely called the altered scale, is so named because all the scale members