C# m7(b9)(no5)/C

The C# m7(b9)(no5) chord consists of the C# (Perfect unison), E (Minor third), B (Minor seventh) and D (Minor ninth) notes, with C as the bass note.

Piano keyboard showing the notes for a C# m7(b9)(no5)/C chord

How to play the C# m7(b9)(no5)/C chord

  1. Play C as the lowest bass note in the left hand
  2. Find C# (Root) on the piano keyboard
  3. Add E (Minor third) — 3 semitones above C#
  4. Add B (Minor seventh) — 10 semitones above C#
  5. Add D (Minor ninth) — 13 semitones above C#
  6. Press all 5 notes simultaneously to sound the C# m7(b9)(no5)/C chord