How do you play the C 7(b9)/D chord?

To play the C 7(b9)/D chord on piano, play the C 7(b9) chord (C, E, G, A# and C#) with D as the lowest bass note. Place the D 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 7(b9)/D chord means a C 7(b9) chord with D in the bass.

C 7(b9)/D

Q: What notes are in the C 7(b9)/D chord?

The C 7(b9)/D chord uses the 5 notes of the C 7(b9) chord — C (Perfect unison), E (Major third), G (Perfect fifth), A# (Minor seventh) and C# (Minor ninth) — with D played as the bass note in the lowest register.

The C 7(b9) chord consists of the C (Perfect unison), E (Major third), G (Perfect fifth), A# (Minor seventh) and C# (Minor ninth) notes, with D as the bass note.

Piano keyboard showing the notes for a C 7(b9)/D chord

How to play the C 7(b9)/D chord

Play D as the lowest bass note in the left hand
Find C (Root) on the piano keyboard
Add E (Major third) — 4 semitones above C
Add G (Perfect fifth) — 7 semitones above C
Add A# (Minor seventh) — 10 semitones above C
Add C# (Minor ninth) — 13 semitones above C
Press all 6 notes simultaneously to sound the C 7(b9)/D chord