A 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 major scale is

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

To make an "A minor seventh" (Am7) chord we use 

the 1^st  note A 

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

the 5^th note E 

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

This gives us the notes A, C, E and G which form the "A minor seventh" chord

"A minor seventh" (Am7) on the guitar

  "A minor seventh" (Am7) on the piano