G#madd9 chord
G# minor added ninth
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>G
F#
G
G#
A
A#9
B
C
C#
D
D#
E
F
F#
G
A#
C
C
C#
D
D#5
E
F
F#
G
G#
A
A#
B
C
D#
E
D#
E
F
F#
G
G#1
A
A#
B
C
C#
D
D#
E
G#
A
G#
A
A#
Bb3
C
C#
D
D#
E
F
F#
G
G#
A
B
3
5
7
10
The G#madd9 chord has the formula 1, b3, 5, 9 with notes G#, B, D#, A#
The minor added ninth chord can be built by taking a minor chord and adding the 9th of the scale. It serves a similar purpose to the minor chord, with the additional ninth extension for flavor.