Arpeggio quality
maj9
The major ninth chord extends the major seventh with a ninth, adding a layer of shimmer above an already luminous harmony. The seventh still supplies the soft pull toward the root, while the ninth floats a whole step higher, bright and bell-like. This is the sound of smooth jazz, neo-soul and modern gospel: rich but not crowded, because the fifth is usually the first note players drop when the voicing gets tight. Arpeggiated in one position, it spreads five notes across a comfortable stretch. Listen for the ninth sitting on top of the seventh — it is the note that makes the chord sound wide rather than merely tall.
- Formula
- 1 3 5 7 9
- Notes
- C♯ E♯ G♯ B♯ D♯
- Family
- Major
Notation in C♯
representative keyFretboard — frets 0–12
All 17 keys
open a key →Same family
How to practise this arpeggio
- Play the ninth last and let it float above the seventh.
- Comp the shape in a high position to hear the ninth as the melody note.
- Omit the fifth and check that the chord still sounds complete.
- Loop it over a static major chord and improvise with the top two notes.