Tip: click the root notes to see fingering suggestions
G♭ Dominant 7th (♭5) :: G♭ B♭ C E

A
E
C
G
♭7
♭5
3
G♭
♭5
3
♭7
♭5
3
G♭
♭7
♭5
G♭
♭7
3
G♭
⬤ ⬤
♭7
♭5
⬤ ⬤
B♭ C
A♭ Major 13th :: A♭ C E♭ G B♭ D♭ F

A
E
C
G
3
7
9
13
11
A♭
3
7
5
9
11
A♭
13
3
5
9
11
7
13
3
A♭
5
11
7
9
13
A♭
5
⬤ ⬤
3
7
⬤ ⬤