Altered chord

In music, an altered chord, an example of alteration, is a chord with one or more diatonic notes replaced by, or altered to, a neighboring pitch in the chromatic scale. For example the following progression:

Related Topics:
Music - Alteration - Diatonic - Chromatic scale

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

uses an altered IV chord and is an alteration of:

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

The Ab serves as a leading tone to G.

~ ~ ~ ~ ~ ~ ~ ~ ~ ~