Dbadd11 chord
Db added eleventh
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G
Gb
G
Ab5
A
Bb
B
C
Db
D
Eb
E
F
Gb
G
Ab
C
C
Db
D
Eb
E
F3
Gb
G
Ab
A
Bb
B
C
F
E
Eb
E
F
Gb11
G
Ab
A
Bb
B
C
Db
D
Eb
E
Gb
A
Ab
A
Bb
B
C
Db1
D
Eb
E
F
Gb
G
Ab
A
Db
3
5
7
10
The Dbadd11 chord has the formula 1, 3, 5, 11 with notes Db, F, Ab, Gb
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.