Ebadd11 chord
Eb added eleventh
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>G
Gb
G
Ab11
A
Bb
B
C
Db
D
Eb
E
F
Gb
G
Ab
C
C
Db
D
Eb1
E
F
Gb
G
Ab
A
Bb
B
C
Eb
E
Eb
E
F
Gb
G3
Ab
A
Bb
B
C
Db
D
Eb
E
G
A
Ab
A
Bb5
B
C
Db
D
Eb
E
F
Gb
G
Ab
A
Bb
3
5
7
10
The Ebadd11 chord has the formula 1, 3, 5, 11 with notes Eb, G, Bb, Ab
The added eleventh chord can be built by taking a major chord and adding the 11th of the scale. It is somewhat dissonant because the 3rd and 11th are one semitone apart.