How do you play the A# 9(#5)/C# chord?

To play the A# 9(#5)/C# chord on piano, play the A# 9(#5) chord (A#, D, F#, G# and C) with C# as the lowest bass note. Place the C# 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 A# 9(#5)/C# chord means a A# 9(#5) chord with C# in the bass.

A# 9(#5)/C#

Q: What notes are in the A# 9(#5)/C# chord?

The A# 9(#5)/C# chord uses the 5 notes of the A# 9(#5) chord — A# (Perfect unison), D (Major third), F# (Minor sixth), G# (Minor seventh) and C (Major ninth) — with C# played as the bass note in the lowest register.

The A# 9(#5) chord consists of the A# (Perfect unison), D (Major third), F# (Minor sixth), G# (Minor seventh) and C (Major ninth) notes, with C# as the bass note.

Piano keyboard showing the notes for a A# 9(#5)/C# chord

How to play the A# 9(#5)/C# chord

Play C# as the lowest bass note in the left hand
Find A# (Root) on the piano keyboard
Add D (Major third) — 4 semitones above A#
Add F# (Minor sixth) — 8 semitones above A#
Add G# (Minor seventh) — 10 semitones above A#
Add C (Major ninth) — 14 semitones above A#
Press all 6 notes simultaneously to sound the A# 9(#5)/C# chord

Related slash chords

G# 9(b5)/C#