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

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

C# dim/B#

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

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

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

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

How to play the C# dim/B# chord

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

Inversions with same root

C addb9

Related chords with different root

C# m(maj7)(b5)