A Diminished Seventh Chord
Also known as:
A Diminished 7th , Adim7 , Ao7
The A Diminished Seventh Chord has a diminished quality which is made by stacking minor Third intervals creating a minor Third, a diminished (lowered or flattened) Fifth that together produce a dark, tense sound. A Diminished Seventh Chord contains the notes A, C, E♭, G♭. The A Diminished Seventh Chord is a Seventh type chord which means it consists of a Triad (the Root A, the Third C, and the Fifth E♭) and the Seventh G♭.
Below you will find the A Diminished Seventh Chord notes, notation, degrees, intervals, related scales and chords, and more.
Notes
A, C, E♭, G♭
Notation
Degrees
| Note | Number | Name |
|---|---|---|
| A | 1 | Tonic |
| C | ♭3 | Mediant |
| E♭ | ♭5 | Dominant |
| G♭ | 7 | Subtonic |
Intervals
| Notes | Semitones | Interval |
|---|---|---|
| A > A | 0 | Perfect Unison (P1) |
| A > C | 3 | minor 3rd (m3) |
| A > E♭ | 6 | Diminished 5th (d5 or Tritone) |
| A > G♭ | 9 | Diminished 7th (d7) |
Scales related to A Diminished Seventh Chord
Same Spellings
Scales that include all of the notes of the A Diminished Seventh Chord.
viio Chord of B♭ Harmonic Minor Scale
iiio Chord of F Phrygian Dominant Mode
Different Spellings
Scales that include different spellings of all the notes of the A Diminished Seventh Chord.
viio Chord of A♯ Harmonic Minor Scale
iiio Chord of E♯ Phrygian Dominant Mode
Chords related to A Diminished Seventh Chord
Same Notes
Chords that have all of the same notes (in any spelling) as the A Diminished Seventh Chord.
B♯ Diminished Seventh Chord
C Diminished Seventh Chord
D♯ Diminished Seventh Chord
E♭ Diminished Seventh Chord
F♯ Diminished Seventh Chord
G♭ Diminished Seventh Chord
Same Root Note
Chords that include the same notes (in any spelling) as the A Diminished Seventh Chord and have the same root note.
No matches found
Different Root Note
Chords that include the same notes (in any spelling) as the A Diminished Seventh Chord but have a different root note.
B Dominant Seventh Flat Ninth Chord
C♭ Dominant Seventh Flat Ninth Chord
D Dominant Seventh Flat Ninth Chord
E♯ Dominant Seventh Flat Ninth Chord
F Dominant Seventh Flat Ninth Chord
G♯ Dominant Seventh Flat Ninth Chord
A♭ Dominant Seventh Flat Ninth Chord
B♯ Diminished Seventh Chord
C Diminished Seventh Chord
D♯ Diminished Seventh Chord
E♭ Diminished Seventh Chord
F♯ Diminished Seventh Chord
G♭ Diminished Seventh Chord
If you want to learn what chords are and much more, check out our free Fundamentals of Music Theory course. If you already know some of the basics, you can jump straight into the chords lesson.
