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

To play the G 9(#11)/C chord on piano, play the G 9(#11) chord (G, B, D, F, A and C#) with C as the lowest bass note. Place the C 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 G 9(#11)/C chord means a G 9(#11) chord with C in the bass.

G 9(#11)/C

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

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

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

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

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

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