B9#5 chord on piano

B Augmented Ninth. Notes: B, D#, G, A and C#.

B9#5 piano chord, root positionBC4GAC5D#C#
Root position. Tap any key to hear it.

How to play B9#5

  1. Find B just below middle C. That is the root.
  2. Add D#, G, A and C# 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

Broot
D#3 · major third
G#5 · augmented fifth
Ab7 · minor seventh
C#9 · ninth

Notes and theory

Broot
D#3 · major third
G#5 · augmented fifth
Ab7 · minor seventh
C#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 Baug9 and B+9. Strictly by music theory the notes are spelled B, D#, F##, A and C#; F## is the same key as G.

More B chords

All B piano chords

augmented ninth chords in every key

Questions

What notes are in the B9#5 chord?

B9#5 (B augmented ninth) is made of five notes: B (root), D# (major third), G (augmented fifth), A (minor seventh) and C# (ninth).

How do you play B9#5 on piano?

Play B, D#, G, A and C# 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.