How do you play the C 11(b5)(sus4)/Bb chord?

To play the C 11(b5)(sus4)/Bb chord on piano, play the C 11(b5)(sus4) chord (C, F, Gb and Bb) with Bb as the lowest bass note. Place the Bb 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 11(b5)(sus4)/Bb chord means a C 11(b5)(sus4) chord with Bb in the bass.

C 11(b5)(sus4)/Bb

Q: What notes are in the C 11(b5)(sus4)/Bb chord?

The C 11(b5)(sus4)/Bb chord uses the 4 notes of the C 11(b5)(sus4) chord — C (Perfect unison), F (Perfect fourth), Gb (Diminished fifth) and Bb (Minor seventh) — with Bb played as the bass note in the lowest register.

The C 11(b5)(sus4) chord consists of the C (Perfect unison), F (Perfect fourth), Gb (Diminished fifth) and Bb (Minor seventh) notes, with Bb as the bass note.

Piano keyboard showing the notes for a C 11(b5)(sus4)/Bb chord

How to play the C 11(b5)(sus4)/Bb chord

Play Bb as the lowest bass note in the left hand
Find C (Root) on the piano keyboard
Add F (Perfect fourth) — 5 semitones above C
Add Gb (Diminished fifth) — 6 semitones above C
Add Bb (Minor seventh) — 10 semitones above C
Press all 5 notes simultaneously to sound the C 11(b5)(sus4)/Bb chord

Related chords with different root

C 11(b5)(sus4)
F# maj7(b5)

Related slash chords

C sus4(b5)/Bb
F# maj7(b5)(sus)/A#