G Dominant Thirteen Sharp Ninth Guitar Chord (G13(#9)) | Easy Ways to Play It
G13(#9) (G thirteenth sharp nine) follows the formula 1, 3, 5, b7, #9, 11, 13, so on G it reads G, B, D, F, A#, C and E.
The raised ninth A# sounds like Bb, a minor third above the root, right next to the major third B. Every tone of the chord except the eleventh sits inside the G Half-Whole scale, which alternates half and whole steps.
The dominant seventh G7 (G, B, D, F) is the core of the chord. Its pull leads to the chord a fourth above G, which is C.
G 13th with sharp 9th guitar chord is also written as G13(#9), G13#9 or G13+9.
Notes in the G 13(#9) chord:
Chord Formula:
Formula: 1 3 5 b7 #9 11 13
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Created by
Giancarlo is a musician (teaching guitar since 2000), software engineer, AI consultant and published researcher
FAQ
Which notes does G13(#9) contain?
G13(#9) is spelled G, B, D, F, A#, C and E. It stacks a major third, perfect fifth, minor seventh, sharp ninth, eleventh and thirteenth over G.
What scale can I play over G13(#9)?
The G half-whole scale covers every chord tone except the eleventh, C. It includes A#, the sharp ninth, and E, the thirteenth.
Why does G13(#9) contain both B and A#?
B is the major third and A# is the sharp ninth. They sit a half step apart in sound, which gives the chord its sharp internal clash.
What is the sharp ninth in G13(#9)?
It is A#. The major ninth over G is A, and raising it by a half step gives A#, a note that sounds like Bb.
