How do you play the B dim/D# chord?

To play the B dim/D# chord on piano, play the B dim chord (B, D and F) 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 B dim/D# chord means a B dim chord with D# in the bass.

B dim/D#

Q: What notes are in the B dim/D# chord?

The B dim/D# chord uses the 3 notes of the B dim chord — B (Perfect unison), D (Minor third) and F (Diminished fifth) — with D# played as the bass note in the lowest register.

The B dim chord consists of the B (Perfect unison), D (Minor third) and F (Diminished fifth) notes, with D# as the bass note.

Piano keyboard showing the notes for a B dim/D# chord

How to play the B dim/D# chord

Play D# as the lowest bass note in the left hand
Find B (Root) on the piano keyboard
Add D (Minor third) — 3 semitones above B
Add F (Diminished fifth) — 6 semitones above B
Press all 4 notes simultaneously to sound the B dim/D# chord