How do you play the G# maj13(#11)/C# chord?

To play the G# maj13(#11)/C# chord on piano, play the G# maj13(#11) chord (G#, C, D#, G, A#, D and F) 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# maj13(#11)/C# chord means a G# maj13(#11) chord with C# in the bass.

G# maj13(#11)/C#

Q: What notes are in the G# maj13(#11)/C# chord?

The G# maj13(#11)/C# chord uses the 7 notes of the G# maj13(#11) chord — G# (Perfect unison), C (Major third), D# (Perfect fifth), G (Major seventh), A# (Major ninth), D (Augmented eleventh) and F (Major thirteenth) — with C# played as the bass note in the lowest register.

The G# maj13(#11) chord consists of the G# (Perfect unison), C (Major third), D# (Perfect fifth), G (Major seventh), A# (Major ninth), D (Augmented eleventh) and F (Major thirteenth) notes, with C# as the bass note.

Piano keyboard showing the notes for a G# maj13(#11)/C# chord

How to play the G# maj13(#11)/C# chord

Play C# as the lowest bass note in the left hand
Find G# (Root) on the piano keyboard
Add C (Major third) — 4 semitones above G#
Add D# (Perfect fifth) — 7 semitones above G#
Add G (Major seventh) — 11 semitones above G#
Add A# (Major ninth) — 14 semitones above G#
Add D (Augmented eleventh) — 18 semitones above G#
Add F (Major thirteenth) — 21 semitones above G#
Press all 8 notes simultaneously to sound the G# maj13(#11)/C# chord