F# Dominant Thirteen Flat Nine Guitar Chord Charts & Variations

F# 13(b9) guitar chord shapes

Seven notes make up F#13(b9) (F# thirteenth flat nine): F#, A#, C#, E, G, B and D#.

The flat ninth G sits only a half step above the root F#, and that close clash is what the (b9) in the symbol describes. The F# Half-Whole scale, built from alternating half and whole steps, contains every chord tone except the eleventh B.

From the dominant seventh F#7 (F#, A#, C#, E) the chord grows by adding that flat ninth, the eleventh and the thirteenth D#. As a dominant chord it usually resolves to the chord a fourth above F#.

F# 13th with flat 9th guitar chord is also written as F#13(b9), F#13b9 or F#13-9.

Notes of the F# 13(b9) chord:

F# A# C# E G B D#

Formula of the Dominant Thirteen Flat Nine chord:

Formula: 1 3 5 b7 b9 11 13

Play This Chord With Other Roots

C 13(b9) | D 13(b9) | E 13(b9) | F 13(b9) | G 13(b9) | A 13(b9) | B 13(b9) | C#13(b9) | D#13(b9) | F#13(b9) | G#13(b9) | A#13(b9) | Ab13(b9) | Bb13(b9) | Db13(b9) | Eb13(b9) | Gb13(b9)

Giancarlo Facoetti, founder of FaChords Guitar

Created by

Giancarlo Facoetti

Giancarlo is a musician (teaching guitar since 2000), software engineer, AI consultant and published researcher

FAQ

What notes are in F#13(b9)?

F#13(b9) is spelled F#, A#, C#, E, G, B and D#. That is the root, major third, perfect fifth, minor seventh, flat ninth, eleventh and thirteenth.

Why is the flat ninth of F#13(b9) written G?

The major ninth from F# would be G#, a whole step past the octave. Lowering it by a half step gives G natural, so the chord has an E and a G side by side.

Is F#13(b9) the same as Gb13(b9)?

Yes. Gb13(b9) spells the same pitches Gb, Bb, Db, Fb, Abb, Cb and Eb, so the two names sound alike and differ only in notation.

What scale fits F#13(b9)?

The F# half-whole scale holds all chord tones apart from the eleventh, B. It also contains the flat ninth, G, and the thirteenth, D#.