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

To play the C dim7/A# chord on piano, play the C dim7 chord (C, D#, F# and A) with A# as the lowest bass note. Place the A# 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/A# chord means a C dim7 chord with A# in the bass.

C dim7/A#

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

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

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

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

How to play the C dim7/A# chord

Play A# as the lowest bass note in the left hand
Find C (Root) on the piano keyboard
Add D# (Minor third) — 3 semitones above C
Add F# (Diminished fifth) — 6 semitones above C
Add A (Major sixth) — 9 semitones above C
Press all 5 notes simultaneously to sound the C dim7/A# chord

Related slash chords

D# dim7/A#
F# dim7/A#
A dim7/A#