A#dim7 Piano Chord

A#dim7

A# Diminished 7th (with Flat 5th)

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

The Notes in a A# Diminished 7th (with Flat 5th) Chord

The Min 3rd

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 b 5th

Finding E from A# step by step:

  • Start on: A#
  • Step 1: move up to B
  • Step 2: move up to B#
  • Step 3: move up to C#
  • Step 4: move up to CX
  • Step 5: move up to D#
  • Step 6: Land on E
b 5th
E
Root
A#
1
2
3
4
5
  • B is a minor second above A#.
  • B# is a major 2nd above A#.
  • C# is a minor third above A#.
  • CX is a major third above A#.
  • D# is a fourth above A#.
  • E is a flat fifth above A#.

The Maj 6th

Finding FX from A# step by step:

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