C# 7(#11)

The C# 7(#11) chord consists of the C# (Perfect unison), F (Major third), G# (Perfect fifth), B (Minor seventh) and G (Augmented eleventh) notes.

Piano keyboard showing the notes for a C# 7(#11) chord

How to play the C# 7(#11) chord

  1. Find C# (Root) on the piano keyboard
  2. Add F (Major third) — 4 semitones above C#
  3. Add G# (Perfect fifth) — 7 semitones above C#
  4. Add B (Minor seventh) — 10 semitones above C#
  5. Add G (Augmented eleventh) — 18 semitones above C#
  6. Press all 5 notes simultaneously to sound the C# 7(#11) chord

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