C# 9

The C# 9 chord consists of the C# (Perfect unison), F (Major third), G# (Perfect fifth), B (Minor seventh) and D# (Major ninth) notes.

Piano keyboard showing the notes for a C# 9 chord

How to play the C# 9 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 D# (Major ninth) — 14 semitones above C#
  6. Press all 5 notes simultaneously to sound the C# 9 chord

Related slash chords