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)
The G major scale is
G
|
A
|
B
|
C
|
D
|
E
|
F#
|
1
|
2
|
3
|
4
|
5
|
6
|
7
|
To make a “G minor seventh” (Gm7) chord we use
the 1st note G
the b3rd (half step lower from the 3rd)
note A#
the 5th note D
the b7th (half step lower from the 7th)
note F
This gives us the notes G, A#, D and F which form the “G
minor seventh” chord
"G minor seventh" (Gm7) on the guitar
"G minor seventh" (Gm7) on the piano