If the tritone is spelled enharmonically as a diminished fifth, all tones of the scale can be use to build a dominant ninth chord with (1) a lowered fifth and an added minor thirteen or (2) a raised fifth and and augmented eleventh. The latter can also be seen as a polychord of two augmented triads. These chords can be produced on every step of the scale. The harmonic potential of the scale centers on the sound of a complex altered dominant chord.