C# maj7(add13)/B

The C# maj7(add13) chord consists of the C# (Perfect unison), F (Major third), G# (Perfect fifth), C (Major seventh) and A# (Major thirteenth) notes, with B as the bass note.

Piano keyboard showing the notes for a C# maj7(add13)/B chord

How to play the C# maj7(add13)/B chord

  1. Play B as the lowest bass note in the left hand
  2. Find C# (Root) on the piano keyboard
  3. Add F (Major third) — 4 semitones above C#
  4. Add G# (Perfect fifth) — 7 semitones above C#
  5. Add C (Major seventh) — 11 semitones above C#
  6. Add A# (Major thirteenth) — 21 semitones above C#
  7. Press all 6 notes simultaneously to sound the C# maj7(add13)/B chord

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