Watch the G Altered Dominant online guitar lesson by Christopher Woitach from Jazz Textures
Here we touch briefly on a very large subject, altered dominant chords. There many scalar possibilities for altered dominant chords, but in this example we only use one, the seventh mode of ascending melodic minor, sometimes referred to as the Super Locrian scale. This scale creates all the altered possibilities for a dominant chord, and thus is a very popular scale in jazz. The melodic minor scale has many uses in jazz music, and should be an important part of your jazz study.
There are general situations where an altered chord is a strong choice, when the next chord is either a fourth higher (a V to I situation), a half step lower, or a minor chord with the same root. These situations are excellent spots to use the chord we come up with in this segment.