A
A9sus4
Notes
A · D · E · G · B
Intervals
- RootA (1P)
- Perfect 4thD (4P)
- Perfect 5thE (5P)
- Minor 7thG (7m)
- Major 9thB (9M)
Fretboard
Adjust labels, frets, and palette in the interactive view.
About
The A9sus4 (A–D–E–G–B) extends 7sus4 with a 9th. The B adds color above the suspended structure, and the absence of the third means the chord can function either as deferred dominant tension or as a stable texture in its own right — the latter is common in gospel and R&B, where 9sus4 chords are often held for extended periods without resolving. The 4th, ♭7, and 9th are the essential tones; the 5th can be dropped. Compared to A7sus4, the 9th adds warmth and sophistication without increasing the sense of urgency. When it does resolve, D is the typical landing.
Similar chords
Chords sharing two or more notes with this one, ranked by overlap.
Scales containing this chord
- A Natural Minor (I)
- B Natural Minor (VII)
- C Major (VI)
- D Major (V)
- D Melodic Minor (V)
- E Blues (deg 3)
- E Minor Pentatonic (deg 3)
- E Natural Minor (IV)
- G Major (II)
- G Major Pentatonic (deg 2)
- A Dorian (I)
- A Mixolydian (I)
- B Locrian (VII)
- B Phrygian (VII)
- C Lydian (VI)
- D Dorian (V)
- D Mixolydian (V)
- E Dorian (IV)
- E Phrygian (IV)
- F Lydian (III)
- F♯ Locrian (III)
- F♯ Phrygian (III)
- G Lydian (II)
- G Mixolydian (II)
Scales whose notes include every chord tone. Roman numeral marks the chord root’s position in the scale; dashed badges aren’t linked yet.