C# addb9/F#

The C# addb9 chord consists of the C# (Perfect unison), F (Major third), G# (Perfect fifth) and D (Minor ninth) notes, with F# as the bass note.

Piano keyboard showing the notes for a C# addb9/F# chord

How to play the C# addb9/F# chord

  1. Play F# 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 D (Minor ninth) — 13 semitones above C#
  6. Press all 5 notes simultaneously to sound the C# addb9/F# chord

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