C9 Piano Chord
C9 for Piano has the notes C E G Bb D. Listen to it and learn about its interval structure: R 3 5 m7 9.
C9 Chord
Full name: C ninthAKA: C7(add9) C7/9
Piano sound:
On this page:
ChartsInversionsStructureRelated chordsChord on other instrumentsRelated scalesChord staffSummary tableReferencesAdjust notes
C9 Piano Chord Charts
Piano chord chart

C9 Inversions on piano
C9 Chord Structure
Notes: C E G Bb DInterval structure: R 3 5 m7 9
Chord construction:
R = C
C + major interval = E (scale degree = 3rd)
E + minor interval = G (scale degree = 5th)
G + minor interval = Bb (scale degree = minor 7th)
Bb + major interval = D (scale degree = 9th)
Chords related to C9
C9\G ;C9 on other instruments
C9 piano




Scales Related to C9
Scales that include all of the notes of C9.F major F melodic minor G melodic minor F ionian D natural minor G dorian A phrygian A#/Bb lydian C mixolydian D aeolian E locrian G#/Ab leading whole tone C overtone A#/Bb overtone E altered F#/Gb altered F#/Gb enigmatic C#/Db dorian b2 B dorian b2 G#/Ab augmented lydian
C9 chord staff

C9 summary table
Piano chord name | C9 (C ninth) |
Piano sound | |
Notes and structure | C E G Bb D (R 3 5 m7 9) |
Related Chords | C9\G ; |
Chord Categories | is 7 (dom7) with added 9th 9th chord |
Other Notations | C7(add9) C7/9 |
Chord Construction | R = C C + major interval = E (scale degree = 3rd) E + minor interval = G (scale degree = 5th) G + minor interval = Bb (scale degree = minor 7th) Bb + major interval = D (scale degree = 9th) |
C9 on other instruments | C9 piano![]() ![]() ![]() ![]() ![]() |
Tweak notes of C9
C#
Db
D#
Eb
F#
Gb
G#
Ab
A#
Bb
C#
Db
D#
Eb
F#
Gb
G#
Ab
A#
Bb
C
D
E
F
G
A
B
C
D
E
F
G
A
B
References related to this chord
is 7 (dom7) with added 9th 9th chordNinth Chords on Wikipedia
Major Seventh Chords on Wikipedia