Augmented sixth chord

Excessive five chord is a four-part chord consisting of a major triad with excessive sixth. The chord corresponds to the dominant sound, but is generally treated and resolved differently. In jazz harmony it is interpreted as Tritonussubstitution.

Example 1: dominant with resolution:

Example 2: excessive five chord with resolution:

While the dominant seventh chord has a simple dominant function tables, the excessive five chord is used double dominant diagram and is thus continued on the dominant. However, it is often not directly dissolved into the dominant, because it creating any problems with the contrapuntal correct voice leading (open fifths ). Some composers, notably Mozart, however, disregarded in this particular case, the Quint Parallel ban. Therefore, the Mozart fifths occurring in the direct resolution of the excessive five chord in the dominant deemed allowable exception to the rule.

In the above musical examples can be seen clearly that the seventh of the dominant seventh down the excessive sixth of excessive Quintsextakkords other hand, is resolved to the top.

In the theory of functions of excessive five chord is interpreted as a reversal of a Dominantseptnonakkords with diminished fifth, minor ninth and without root. In the above example would be the basic position of the chord:

This also shows that the sample tonal chord does not relate to the nearby C major, but on F-sharp major. Because of the possibility of enharmonic change the excessive five chord is preferably used in the Romance for modulations.

• Chord