The dominant chords are presented in a variety of ways within a composition/ cadence and each of these ways have different qualities and forms of resolution, which give us the guidelines of how to analyze and tag them in order to understand how they work and what to play over them.
The 5 types of dominant chords that I present below can be found in various compositions/ songs/ cadences on different styles of music.
Primary Dominants: Both in Major and Minor keys, are those dominant chords found in the fifth degree of the scale (V7). They have the tendency to resolve to the first degree (I) by intervals of the fourths, reaffirming the key of a song/ cadence.
Secondary Dominants: Are those diatonic chords that are not Dominants and become momentarily Dominants to resolve by interval of fourths. Secondary Dominators tend to simulate the color of the Primary Dominants.
Tritone Substitute Dominants: are Dominant chords that replace / re-harmonize any kind of Dominants. They arise from changing the original chord by another from their sharp fourth degree (# 4) and tend to resolve by descending half step.
Extended Dominants: Are a pattern of Dominant chords that resolve in another Dominant by intervals of fourth.
Contiguous Dominants: Are patterns of Dominant chords ascending by whole or half step (usually) to another Dominant.
See you in the next post!