B♭ Dominant 7th :: B♭ D F A♭

G
D
A
E
3
♭7
B♭
5
B♭
5
♭7
3
♭7
B♭
3
B♭
5
5
3
♭7
⬤ ⬤
3
⬤ ⬤
B Major 6th :: B D♯ F♯ G♯

G
D
A
E
6
3
B
5
B
5
6
6
3
B
3
B
5
5
6
3
⬤ ⬤
⬤ ⬤