How do you play the C# 9(#11)/G# chord?

To play the C# 9(#11)/G# chord on piano, play the C# 9(#11) chord (C#, F, G#, B, D# and G) with G# as the lowest bass note. Place the G# note below the other chord tones. Slash chords specify a particular bass note different from the chord root.

What is a slash chord?

A slash chord (or compound chord) is written as Chord/Bass and specifies both a chord and a bass note. The note to the right of the slash is played as the lowest note. The C# 9(#11)/G# chord means a C# 9(#11) chord with G# in the bass.

C# 9(#11)/G#

Q: What notes are in the C# 9(#11)/G# chord?

The C# 9(#11)/G# chord uses the 6 notes of the C# 9(#11) chord — C# (Perfect unison), F (Major third), G# (Perfect fifth), B (Minor seventh), D# (Major ninth) and G (Augmented eleventh) — with G# played as the bass note in the lowest register.

The C# 9(#11) chord consists of the C# (Perfect unison), F (Major third), G# (Perfect fifth), B (Minor seventh), D# (Major ninth) and G (Augmented eleventh) notes, with G# as the bass note.

Piano keyboard showing the notes for a C# 9(#11)/G# chord

How to play the C# 9(#11)/G# chord

Play G# as the lowest bass note in the left hand
Find C# (Root) on the piano keyboard
Add F (Major third) — 4 semitones above C#
Add G# (Perfect fifth) — 7 semitones above C#
Add B (Minor seventh) — 10 semitones above C#
Add D# (Major ninth) — 14 semitones above C#
Add G (Augmented eleventh) — 18 semitones above C#
Press all 7 notes simultaneously to sound the C# 9(#11)/G# chord

Related chords with different root

C# 9(#11)

Related slash chords

C# 9(b5)/G#
D# 9(#5)/G#