Dominant 13th chords (13) - Guitar Voicing Shapes and Formulas
What's a Dominant 13th Chord ?
A dominant 13th chord is a 7th chord with three extra notes, the ninth (9), eleventh (11) and thirteenth (13) giving the following formula :
- Root (1)
- Major third (3)
- Perfect fifth (5)
- Minor seventh (b7)
- Ninth (9)
- Eleventh (11)
- Thirteenth (13)
How Dominant Chords are Built?
When building a dominant chord, you generally stack thirds on top of each other and give a name to this chord related to the number of steps from the root note to the highest :
A triad is formed with a root (1), a third (3) and perfect fifth (5). Adding a third to this triad gives a dominant 7 chord (1, 3, 5, b7). Adding another third to a dom7 chord gives a dominant ninth chord (9). Just add another third and you get a dominant eleventh chord (11) and a last third gives you finally a dominant thirteenth chord (13).
|Dominant 7th chord||1||3||5||b7|
|Dominant 9th chord||1||3||5||b7||9|
In this stack of tones (the 13th chord), the interval 3-11 (E-F for C major) is considered as dissonant so generally the 11 is omitted to avoid this dissonance. It is better not to skip the third nor the 7th, since this would spoil the color of the 13th chord.
The 5th can be skipped, it is not the most interesting and important note in this chord. The root (1), when played by the bass player or the pianist can be omitted. So to play a dominant 13 chord on the guitar, a normal voicing would be 1-3-b7-13. However, the 9th could possibly be added.
What's the difference between a 6th and a 13th chord?
That is a frequently asked question indeed, it is important to differentiate between 3 and 13 chords. Generally a 13 chord refers to a dominant chord that contain an added 6 in the upper structure, in other word a 13. Whereas a 6 chord is a major triad with a supplementary sixth (6).
Example with C6 and C13
- C6 is a four-note chord built with C E G A respectively root, third, fifth and sixth.
- C13 is a seven-note chord built with C (root), E (third), G (fifth), Bb (minor seventh), D (ninth), F (eleventh) and A (thirteenth).
How to Play 13 Chords on Guitar?
As it is explained above, it is physically impossible to play all the tones on guitar. You'll find in the following, five common shapes to play dominant 13 chords on guitar. Please note that the first diagram (on the left) and the fifth shape (on the right) could be renamed "7add13". Whereas the three other shapes could be written "9add13" due to the absence of 11.
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Last edited: 07/17/2019