About the G flat thirteen suspended four chord
The G flat thirteen suspended four chord is a G flat thirteenth suspended fourth built from G flat, C flat, D flat, F flat, A flat, E flat. It sits outside the plain diatonic set, so it is borrowed to add color and tension.
It is also written F sharp thirteen suspended four , which spells the same notes enharmonically.
Positions
(root position)
Notes and intervals
| 1 | G flat | Root |
| 2 | C flat | Perfect 4th |
| 3 | D flat | Perfect 5th |
| 4 | F flat | Minor 7th |
| 5 | A flat | Major 9th |
| 6 | E flat | Major 13th |
Shapes
Chromatic
Circle of Fifths
Other G flat chords
Simpler triads
Suspended
Sixths and sevenths
Extensions
Altered
Functional relationships
These chords are where this one most naturally comes from and resolves to inside a key.
Dominant
The dominant is a fifth above the root, and it builds tension that pulls strongly back to this chord.
Subdominant
The subdominant is a fourth above the root (a fifth below), and it usually leads on to the dominant or back home.
Tritone substitution
The tritone substitution is a dominant chord a tritone away that shares the same tension, so it can stand in for this chord and resolve the same way.
