How do you play the B maj7(sus)/A chord?

To play the B maj7(sus)/A chord on piano, play the B maj7(sus) chord (B, 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 notes are in the B maj7(sus)/A chord?

The B maj7(sus)/A chord uses the 3 notes of the B maj7(sus) chord — B (Perfect unison), F# (Perfect fifth) and A# (Major seventh) — with A played as the bass note in the lowest register.

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 B maj7(sus)/A chord means a B maj7(sus) chord with A in the bass.

B maj7(sus)/A

The B maj7(sus) chord consists of the B (Perfect unison), F# (Perfect fifth) and A# (Major seventh) notes, with A as the bass note.

How to play the B maj7(sus)/A chord

Play A as the lowest bass note in the left hand
Find B (Root) on the piano keyboard
Add F# (Perfect fifth) — 7 semitones above B
Add A# (Major seventh) — 11 semitones above B
Press all 4 notes simultaneously to sound the B maj7(sus)/A chord