A# Diminished 7th Piano Chord

Root
A#
Min 3rd
C#
Maj 6th
G
b 5th
E
E
G
B
D
F
F
A
C
E
A#
C#
E
G

The Notes in an A# Diminished 7th Chord

The Root

The root of the chord is always the easiest to find because it's in the name of the chord! The root of an A# Diminished 7th chord is A#.

The Min 3rd

The minor third of an A# Diminished 7th chord is C#. The minor third is up three half-steps from the Root.

Finding C# from A# step by step:

  • Start on: A#
  • Step 1: move up to B
  • Step 2: move up to B#
  • Step 3: Land on C#
Min 3rd
C#
Root
A#
1
2
  • B is a minor second above A#.
  • B# is a major 2nd above A#.
  • C# is a minor third above A#.

The Maj 6th

The major sixth of an A# Diminished 7th chord is G. The major sixth is down three half-steps from the Root (a minor third down).

In diminished chords, the major sixth is also known as the diminished seventh. For the purposes of this tutorial, we'll be learning it as the major sixth, since it's easier to consider it separately than the other two sevenths, the major seventh (M7) and minor seventh (m7)

Finding G from A# step by step:

  • Start on: A#
  • Step 1: move down to GX
  • Step 2: move down to G#
  • Step 3: Land on G
Maj 6th
G
Root
A#
1
2
  • GX is a minor second below A#.
  • G# is a major 2nd below A#.
  • G is a minor third below A#. The maj 6th is down a minor third? Confusing, right? The note G is down 3 half-steps from A#, but up 9 half-steps from A#:
Maj 6th
G
Root
A#
1
2
3
4
5
6
7
8

The Inversions of A# Diminished 7th

Root Position

Root
A#
Min 3rd
C#
Maj 6th
G
b 5th
E
E
G
B
D
F
F
A
C
E
A#
C#
E
G

1st Inversion

Min 3rd
C#
b 5th
E
Maj 6th
G
Root
A#
E
G
B
D
F
F
A
C
E
C#
E
G
A#

2nd Inversion

b 5th
E
Maj 6th
G
Root
A#
Min 3rd
C#
E
G
B
D
F
F
A
C
E
E
G
A#
C#

3rd Inversion

Maj 6th
G
Root
A#
Min 3rd
C#
b 5th
E
E
G
B
D
F
F
A
C
E
G
A#
C#
E

How to find A# Diminished 7th with my three-finger-method

This is the method taught in my book "How to Speed Read Piano Chord Symbols"

Step 1) Use the Fourth

Find the Root and the Fourth up from the Root. (See my tutorial on finding fourths).

Root
A#
Root
A#
4th
D#

Step 2) Move the right hand down

Move the root a minor third down (three keys to the left on the piano) and the other note (the fourth) a whole-step to the left (two keys down on the piano).

Root
A#
Maj 6th
FX
Min 3rd
C#

How to Find 7th Chords with Nate's Three Finger Method

  • Major 7th chords: bring both fingers down a half-step
  • Minor 7th chords: bring both fingers down a whole-step
  • Dominant 7th chords: bring the Root down a whole-step, the fourth down a half-step
  • Diminished 7th chords: bring the Root down a minor third, the fourth down a whole-step

If you would like to learn more about my method, pick up "How to Speed Read Piano Chord Symbols".

Other A# Chords