How do you play the C# m7(#11)/A chord?

To play the C# m7(#11)/A chord on piano, play the C# m7(#11) chord (C#, E, G#, B and G) 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# m7(#11)/A chord means a C# m7(#11) chord with A in the bass.

C# m7(#11)/A

Q: What notes are in the C# m7(#11)/A chord?

The C# m7(#11)/A chord uses the 5 notes of the C# m7(#11) chord — C# (Perfect unison), E (Minor third), G# (Perfect fifth), B (Minor seventh) and G (Augmented eleventh) — with A played as the bass note in the lowest register.

The C# m7(#11) chord consists of the C# (Perfect unison), E (Minor third), G# (Perfect fifth), B (Minor seventh) and G (Augmented eleventh) notes, with A as the bass note.

Piano keyboard showing the notes for a C# m7(#11)/A chord

How to play the C# m7(#11)/A chord

Play A 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# (Perfect fifth) — 7 semitones above C#
Add B (Minor seventh) — 10 semitones above C#
Add G (Augmented eleventh) — 18 semitones above C#
Press all 6 notes simultaneously to sound the C# m7(#11)/A chord