How do you play the Db maj7(no3)/Cb chord?

To play the Db maj7(no3)/Cb chord on piano, play the Db maj7(no3) chord (Db and C) with Cb as the lowest bass note. Place the Cb note below the other chord tones. Slash chords specify a particular bass note different from the chord root.

What notes are in the Db maj7(no3)/Cb chord?

The Db maj7(no3)/Cb chord uses the 2 notes of the Db maj7(no3) chord — Db (Perfect unison) and C (Major seventh) — with Cb 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 Db maj7(no3)/Cb chord means a Db maj7(no3) chord with Cb in the bass.

Db maj7(no3)/Cb

The Db maj7(no3) chord consists of the Db (Perfect unison) and C (Major seventh) notes, with Cb as the bass note.

How to play the Db maj7(no3)/Cb chord

Play Cb as the lowest bass note in the left hand
Find Db (Root) on the piano keyboard
Add C (Major seventh) — 11 semitones above Db
Press all 3 notes simultaneously to sound the Db maj7(no3)/Cb chord