Bb6 chord
Bb major sixth
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Gb
G6
Ab
A
Bb
B
C
Db
D
Eb
E
F
Gb
G
G
C
C
Db
D3
Eb
E
F
Gb
G
Ab
A
Bb
B
C
D
E
Eb
E
F5
Gb
G
Ab
A
Bb
B
C
Db
D
Eb
E
F
A
Ab
A
Bb1
B
C
Db
D
Eb
E
F
Gb
G
Ab
A
Bb
3
5
7
10
The Bb6 chord has the formula 1, 3, 5, 6 with notes Bb, D, F, G
The major sixth chord is used in pop and jazz. Major sixth chords can be substituted for major chords, adding a little flavor to the sound.