How do you play the C m7(b5)/Gb chord?

To play the C m7(b5)/Gb chord on piano, play the C m7(b5) chord (C, Eb, Gb and Bb) with Gb as the lowest bass note. Place the Gb 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 m7(b5)/Gb chord means a C m7(b5) chord with Gb in the bass.

C m7(b5)/Gb

Q: What notes are in the C m7(b5)/Gb chord?

The C m7(b5)/Gb chord uses the 4 notes of the C m7(b5) chord — C (Perfect unison), Eb (Minor third), Gb (Diminished fifth) and Bb (Minor seventh) — with Gb played as the bass note in the lowest register.

The C m7(b5) chord consists of the C (Perfect unison), Eb (Minor third), Gb (Diminished fifth) and Bb (Minor seventh) notes, with Gb as the bass note.

Piano keyboard showing the notes for a C m7(b5)/Gb chord

How to play the C m7(b5)/Gb chord

Play Gb as the lowest bass note in the left hand
Find C (Root) on the piano keyboard
Add Eb (Minor third) — 3 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 m7(b5)/Gb chord

Inversions with same root

F# 6(b5)

Related chords with different root

C m7(b5)
Eb m6
Eb m(add13)

Related slash chords

C m7(no5)/Gb
C m7(#9)(no5)/Gb
Eb 6(sus)/Gb