How do you play the C# maj9(#11)/B chord?

To play the C# maj9(#11)/B chord on piano, play the C# maj9(#11) chord (C#, F, G#, C, D# and G) with B as the lowest bass note. Place the B 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# maj9(#11)/B chord means a C# maj9(#11) chord with B in the bass.

C# maj9(#11)/B

Q: What notes are in the C# maj9(#11)/B chord?

The C# maj9(#11)/B chord uses the 6 notes of the C# maj9(#11) chord — C# (Perfect unison), F (Major third), G# (Perfect fifth), C (Major seventh), D# (Major ninth) and G (Augmented eleventh) — with B played as the bass note in the lowest register.

The C# maj9(#11) chord consists of the C# (Perfect unison), F (Major third), G# (Perfect fifth), C (Major seventh), D# (Major ninth) and G (Augmented eleventh) notes, with B as the bass note.

Piano keyboard showing the notes for a C# maj9(#11)/B chord

How to play the C# maj9(#11)/B chord

Play B 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 C (Major seventh) — 11 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# maj9(#11)/B chord