Arpeggio · A9 · Piano
The A9 arpeggio is A – C♯ – E – G – B — chord tones 1 3 5 ♭7 9. A9 is a fuller V chord; the 9th sits on top of the dominant seventh; its sound is rich, bluesy. Below, every A, C♯, E, G, B on the two-octave keyboard is marked, with the root in gold. Press play to hear a one-octave arpeggio, or tap any note.
Visualizer
Piano
Guitar · standard tuning
Play loops the arpeggio up and down one octave (switch Loop off for a single pass). Tap any marked note to hear it. “Show” switches or combines the fretboard and keyboard; “Sound” picks the instrument you hear. Audio is synthesized in the browser.
Reference
| Chord tone | Note | Interval from A |
|---|---|---|
| 1 | A | unison (0 semitones) |
| 3 | C♯ | major 3rd (4 semitones) |
| 5 | E | perfect 5th (7 semitones) |
| ♭7 | G | minor 7th (10 semitones) |
| 9 | B | major 2nd + octave (14 semitones) |
Goes with: A Mixolydian (A B C♯ D E F♯ G). Voicings: see the four-note chord voicings in the chord library.
Common questions
A – C♯ – E – G – B. As chord tones: 1 3 5 ♭7 9. Played one after another instead of together, that is the arpeggio.
A9 is a fuller V chord; the 9th sits on top of the dominant seventh. Its character is rich, bluesy.
A Mixolydian (A B C♯ D E F♯ G) — the arpeggio is the skeleton of that scale, so practise them together.
Play A – C♯ – E – G – B ascending from A, then descend; then start from each chord tone in turn (inversions) so your hand knows the shape from any note.
Keep going
Same arpeggio on guitar · Dominant 9th hub · chord-scale theory.
Other arpeggios from A