C Minor Added Ninth Chord (Cm(add9))

1Composition: what it contains

C – E♭ – G – D

Symbol

Cm(add9)

Also written

Cmadd9, Cm(add9), C-add9, Cmadd2

Formula

1 ♭3 5 9

2Appearance: diagrams and sound

On the guitar

On the ukulele

On the piano

On the staff

On bass and as an arpeggio

3Indications: what it is used for

Used in pop ballads, film scores, worship music, ambient, post-rock and progressive rock as a more emotional version of a minor chord, typically on i, iv or vi. The ninth rubbing against the minor third gives a bittersweet tension. It is easy to play on guitar with open strings and popular in arpeggiated intros. In jazz it is less common than m9, which adds the seventh. Aeolian or Dorian scales fit over it.

4Dosage: how to practise it

On guitar, learn the stretch shape rooted on the fifth string and the open-string versions; arpeggiate them slowly at 60–80 BPM so every note rings. On piano, play root-2-♭3-5 in close position, then spread versions (root-5 in the left hand, 9-♭3 in the right). Practise progressions such as i–VI–III–VII with madd9 on minor chords. Five minutes a day, comparing m, madd9 and m9. On bass, stay on the root and fifth and let the guitar or piano carry the ninth.

5Warnings and common mistakes

Do not confuse madd9 with m9, which includes the flat seventh. The ninth sits a half step above the minor third in close position, which can sound clashing; spread the voicing if it sounds too dense. The guitar stretch can be hard for small hands; build up slowly to avoid strain. Check that you are not playing a major third by mistake when adapting add9 shapes.

6Interactions with chords, scales and keys

Inversions

• Inversion 1 · Cm(add9)/E♭ · E♭ – G – D – C Play
• Inversion 2 · Cm(add9)/G · G – D – C – E♭ Play
• Inversion 3 · Cm(add9)/D · D – C – E♭ – G Play

Scales to play over Cm(add9)

• C Natural Minor Scale
• C Harmonic Minor Scale
• C Melodic Minor Scale
• C Dorian Mode
• C Major Blues Scale
• C Hungarian Minor Scale

7Other presentations available

The same chord from every note

C♯m(add9) Dm(add9) E♭m(add9) Em(add9) Fm(add9) F♯m(add9) Gm(add9) A♭m(add9) Am(add9) B♭m(add9) Bm(add9)

Other chords on C

C Cm Cdim Caug Csus2 Csus4 C5 C6 Cm6 C7 Cmaj7 Cm7 Cm7♭5 Cdim7 Cm(maj7) C7sus4 Cadd9 C6/9 C9 Cmaj9 Cm9 C11 Cm11 C13 C7♭9 C7♯9 C7♯5 C7♭5