C#9#5 chord on piano

C Sharp Augmented Ninth, also written Db9#5. Notes: C#, F, A, B and D#.

C#9#5 piano chord, root positionC4FABC5C#D#
Root position. Tap any key to hear it.

How to play C#9#5

  1. Find C# at or above middle C. That is the root.
  2. Add F, A, B and D# above it, skipping the keys in between.
  3. Right hand fingering: 1-2-3-4-5, or split the chord between both hands. Left hand: play the root and fifth, and leave the upper notes to the right hand.

Notes

C#root
F3 · major third
A#5 · augmented fifth
Bb7 · minor seventh
D#9 · ninth

Notes and theory

C#root
F3 · major third
A#5 · augmented fifth
Bb7 · minor seventh
D#9 · ninth

The augmented ninth (9#5) is a dominant ninth with a raised fifth, used as a strong pull toward the next chord. The formula is 1 3 #5 b7 9, and you will also see it written as C#aug9 and C#+9. Strictly by music theory the notes are spelled C#, E#, G##, B and D#; E# is the same key as F and G## is the same key as A.

More C# chords

All C# piano chords

augmented ninth chords in every key

Questions

What notes are in the C#9#5 chord?

C#9#5 (C sharp augmented ninth) is made of five notes: C# (root), F (major third), A (augmented fifth), B (minor seventh) and D# (ninth).

How do you play C#9#5 on piano?

Play C#, F, A, B and D# together. With the right hand use fingers 1-2-3-4-5, or split the chord between both hands; with the left hand use play the root and fifth, and leave the upper notes to the right hand.

What does a augmented ninth chord sound like?

The augmented ninth (9#5) is a dominant ninth with a raised fifth, used as a strong pull toward the next chord.