Ebadd9 chord
Eb added ninth
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ukulele fretboard
G
Gb
G3
Ab
A
Bb
B
C
Db
D
Eb
E
F
Gb
G
G
C
C
Db
D
Eb1
E
F
Gb
G
Ab
A
Bb
B
C
Eb
E
Eb
E
F9
Gb
G
Ab
A
Bb
B
C
Db
D
Eb
E
F
A
Ab
A
Bb5
B
C
Db
D
Eb
E
F
Gb
G
Ab
A
Bb
3
5
7
10
The Ebadd9 chord has the formula 1, 3, 5, 9 with notes Eb, G, Bb, F
The added ninth chord can be built by taking a major chord and adding the 9th of the scale. It serves a similar purpose to the major chord, with the additional extension for color or harmonizing with other instruments.