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

To play the B maj9(#11)/C chord on piano, play the B maj9(#11) chord (B, D#, F#, A#, C# 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 B maj9(#11)/C chord means a B maj9(#11) chord with C in the bass.

B maj9(#11)/C

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

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

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

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

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

Play C as the lowest bass note in the left hand
Find B (Root) on the piano keyboard
Add D# (Major third) — 4 semitones above B
Add F# (Perfect fifth) — 7 semitones above B
Add A# (Major seventh) — 11 semitones above B
Add C# (Major ninth) — 14 semitones above B
Add F (Augmented eleventh) — 18 semitones above B
Press all 7 notes simultaneously to sound the B maj9(#11)/C chord