Notes in Cmaj9
The Cmaj9 chord contains 5 notes: C, E, G, B, D
Intervals
| Interval | Semitones | Note | Function |
|---|---|---|---|
| R | 0 | C | Root |
| 3 | 4 | E | Major 3rd |
| 5 | 7 | G | Perfect 5th |
| 7 | 11 | B | Major 7th |
| 9 | 2 | D | Major 9th |
About C Major 9th Chords
Major 9th chords combine maj7 with a 9th for a lush, sophisticated sound. They appear frequently in jazz ballads, bossa nova, and contemporary R&B. Steely Dan built entire careers on maj9 voicings.
Compatible Scales & Modes
These scales contain all the notes of Cmaj9 and can be used for soloing, improvising, and writing melodies over this chord.
EXPLORE MODES
Playing C major ninth on Guitar
The C major ninth chord, spelled C, E, G, B, D, occupies a specific harmonic role that depends on the musical context. In the key of C major, the most fundamental key in Western music, this chord can function as a primary harmony or as a passing color depending on where it appears in the progression. Understanding which scale degrees produce C-rooted chords helps you predict chord progressions and improvise melodies that complement the harmony.
On guitar, C major ninth voicings benefit from open position voicings that resonate beautifully on acoustic guitar. The physical shape of this chord on the fretboard determines its tonal character — the same notes arranged in different voicings produce noticeably different sounds due to string gauge, fret position, and overtone content. Experiment with playing C major ninth in multiple positions to find the voicing that best fits the register and texture of the music you are working on.
Cmaj9 extends the major seventh chord with the ninth, producing lush, complex harmony. The combination of major seventh and ninth intervals in Cmaj9 creates a spacious, colorful sound frequently used in jazz ballads and R&B chord progressions.
When practicing C major ninth, use the compatible scales listed above to improvise melodies and riffs. Start by playing the chord, then explore the scale tones one at a time to hear how each note sounds against the harmony. This ear training exercise connects your theoretical knowledge of C-rooted chords to practical musicianship skills that improve your playing across all genres and styles.