All melodies and chords are composed of intervals.
In tonal improvisation, these intervals typically imply a scale or a chord but occasionally they are used to depart from or to avoid the implication of a predetermined harmonic structure.
The chromatic scle consists entirel of 1/2 steps and contains all 12 notes used in the western musical tradition.
Intervals may be used over chod changes as connecive material or as a means of obscuring tonality.
There is no chord progression for this chapter.