How do you play the C sus(#4)/Bb chord?

To play the C sus(#4)/Bb chord on piano, play the C sus(#4) chord (C, F# and G) 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 sus(#4)/Bb chord means a C sus(#4) chord with Bb in the bass.

C sus(#4)/Bb

Q: What notes are in the C sus(#4)/Bb chord?

The C sus(#4)/Bb chord uses the 3 notes of the C sus(#4) chord — C (Perfect unison), F# (Diminished fifth) and G (Perfect fifth) — with Bb played as the bass note in the lowest register.

The C sus(#4) chord consists of the C (Perfect unison), F# (Diminished fifth) and G (Perfect fifth) notes, with Bb as the bass note.

Piano keyboard showing the notes for a C sus(#4)/Bb chord

How to play the C sus(#4)/Bb chord

Play Bb as the lowest bass note in the left hand
Find C (Root) on the piano keyboard
Add F# (Diminished fifth) — 6 semitones above C
Add G (Perfect fifth) — 7 semitones above C
Press all 4 notes simultaneously to sound the C sus(#4)/Bb chord

Related slash chords

F# Viennese trichord/A#