How do you play the C maj7(b5)(sus)/Bb chord?

To play the C maj7(b5)(sus)/Bb chord on piano, play the C maj7(b5)(sus) chord (C, Gb and B) 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 notes are in the C maj7(b5)(sus)/Bb chord?

The C maj7(b5)(sus)/Bb chord uses the 3 notes of the C maj7(b5)(sus) chord — C (Perfect unison), Gb (Diminished fifth) and B (Major seventh) — with Bb played as the bass note in the lowest register.

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 maj7(b5)(sus)/Bb chord means a C maj7(b5)(sus) chord with Bb in the bass.

C maj7(b5)(sus)/Bb

The C maj7(b5)(sus) chord consists of the C (Perfect unison), Gb (Diminished fifth) and B (Major seventh) notes, with Bb as the bass note.

How to play the C maj7(b5)(sus)/Bb chord

Play Bb as the lowest bass note in the left hand
Find C (Root) on the piano keyboard
Add Gb (Diminished fifth) — 6 semitones above C
Add B (Major seventh) — 11 semitones above C
Press all 4 notes simultaneously to sound the C maj7(b5)(sus)/Bb chord

Related slash chords

F# sus4(b5)/A#