Let's take this chord progression in the C major key and embellish it using secondary dominants:

First, let's prepare the IV degree chord by preceding it by it's dominant. The IV degree chord is F major and C7 is the dominant chord of F:

We write V / IV to indicate a secondary dominant of the IV degree. We refer to these chords as V of IV or V of V, etc.

Now, let's do the same with the V degree chord. The dominant chord of G is D7:

By using these secondary dominant chords we have added some harmonic interest to the original chord progression.

The first measures of Beethoven's first symphony are a good example of secondary dominants use. Note the use of secondary dominants of the IV and V degrees:

Here we show all the secondary dominant chords of all the degrees in the C major key:

Secondary Dominants

Diminished seventh chords have a similar harmonic function. They too can be used as secondary diminished seventh chords. Here we show all the diminished seventh chords in C major:




    
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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
José Rodríguez Alvira.