How do you play the C# dim7/B chord?

To play the C# dim7/B chord on piano, play the C# dim7 chord (C#, E, G and A#) 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# dim7/B chord means a C# dim7 chord with B in the bass.

C# dim7/B

Q: What notes are in the C# dim7/B chord?

The C# dim7/B chord uses the 4 notes of the C# dim7 chord — C# (Perfect unison), E (Minor third), G (Diminished fifth) and A# (Major sixth) — with B played as the bass note in the lowest register.

The C# dim7 chord consists of the C# (Perfect unison), E (Minor third), G (Diminished fifth) and A# (Major sixth) notes, with B as the bass note.

Piano keyboard showing the notes for a C# dim7/B chord

How to play the C# dim7/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#
Add A# (Major sixth) — 9 semitones above C#
Press all 5 notes simultaneously to sound the C# dim7/B chord

Related slash chords

E dim7/B
G dim7/B
A# dim7/B