How do you play the Gb maj7(#11)/Bbb chord?

To play the Gb maj7(#11)/Bbb chord on piano, play the Gb maj7(#11) chord (Gb, Bb, Db, F and C) with Bbb as the lowest bass note. Place the Bbb 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 Gb maj7(#11)/Bbb chord means a Gb maj7(#11) chord with Bbb in the bass.

Gb maj7(#11)/Bbb

Q: What notes are in the Gb maj7(#11)/Bbb chord?

The Gb maj7(#11)/Bbb chord uses the 5 notes of the Gb maj7(#11) chord — Gb (Perfect unison), Bb (Major third), Db (Perfect fifth), F (Major seventh) and C (Augmented eleventh) — with Bbb played as the bass note in the lowest register.

The Gb maj7(#11) chord consists of the Gb (Perfect unison), Bb (Major third), Db (Perfect fifth), F (Major seventh) and C (Augmented eleventh) notes, with Bbb as the bass note.

Piano keyboard showing the notes for a Gb maj7(#11)/Bbb chord

How to play the Gb maj7(#11)/Bbb chord

Play Bbb as the lowest bass note in the left hand
Find Gb (Root) on the piano keyboard
Add Bb (Major third) — 4 semitones above Gb
Add Db (Perfect fifth) — 7 semitones above Gb
Add F (Major seventh) — 11 semitones above Gb
Add C (Augmented eleventh) — 18 semitones above Gb
Press all 6 notes simultaneously to sound the Gb maj7(#11)/Bbb chord