A Sharp Minor Seventh / B Flat Minor Seventh

Every minor seventh (m7) chord is made up of the 1st, b3rd, 5th and b7th notes of the major scale

Choose a chord below to see an example (with chord diagrams)

C

C# Db

D

D# Eb

E

F

F# Gb

G

G# Ab

A

A# Bb

B

The A# / Bb major scale is

A#	C	D	D#	F	G	A
1	2	3	4	5	6	7

To make an “A sharp minor seventh” (A#m7) or “B flat minor seventh” (Bbm7) chord we use

the 1^st note A#

the b3^rd (half step lower from the 3^rd) note C#

the 5^th note F

the b7^th (half step lower from the 7^th) note G#

This gives us the notes A#, C#, F and G# which form the

“A sharp minor seventh” or “B flat minor seventh” chord

“A sharp minor seventh” (A#m7) 

or 

“B flat minor seventh” (Bbm7) on the guitar

“A sharp minor seventh” (A#m7) 

or 

“B flat minor seventh” (Bbm7) on the piano