B♭ Major 6th :: B♭ D F G

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

B
F♯
D
A
3
D
5
7
D
5
3
7
D
3
7
5
D
3
5
7
⬤ ⬤
3
D
5
⬤ ⬤