C m(addb9)

The C m(addb9) chord consists of the C (Perfect unison), D# (Minor third), G (Perfect fifth) and C# (Minor ninth) notes.

Piano keyboard showing the notes for a C m(addb9) chord

How to play the C m(addb9) chord

  1. Find C (Root) on the piano keyboard
  2. Add D# (Minor third) — 3 semitones above C
  3. Add G (Perfect fifth) — 7 semitones above C
  4. Add C# (Minor ninth) — 13 semitones above C
  5. Press all 4 notes simultaneously to sound the C m(addb9) chord

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