How do you play the A# m7(#9)/C chord?

To play the A# m7(#9)/C chord on piano, play the A# m7(#9) chord (A#, C#, 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# m7(#9)/C chord means a A# m7(#9) chord with C in the bass.

A# m7(#9)/C

Q: What notes are in the A# m7(#9)/C chord?

The A# m7(#9)/C chord uses the 5 notes of the A# m7(#9) chord — A# (Perfect unison), C# (Minor third), F (Perfect fifth), G# (Minor seventh) and C# (Minor tenth) — with C played as the bass note in the lowest register.

The A# m7(#9) chord consists of the A# (Perfect unison), C# (Minor third), F (Perfect fifth), G# (Minor seventh) and C# (Minor tenth) notes, with C as the bass note.

Piano keyboard showing the notes for a A# m7(#9)/C chord

How to play the A# m7(#9)/C chord

Play C as the lowest bass note in the left hand
Find A# (Root) on the piano keyboard
Add C# (Minor third) — 3 semitones above A#
Add F (Perfect fifth) — 7 semitones above A#
Add G# (Minor seventh) — 10 semitones above A#
Add C# (Minor tenth) — 15 semitones above A#
Press all 6 notes simultaneously to sound the A# m7(#9)/C chord

Related chords with different root

C# maj7(add13)
A# m9

Related slash chords

C# 6/C
C# add13/C
A# m7/C