How do you play the A m(addb9)/B chord?

To play the A m(addb9)/B chord on piano, play the A m(addb9) chord (A, C, E and A#) with B as the lowest bass note. Place the B 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 m(addb9)/B chord means a A m(addb9) chord with B in the bass.

A m(addb9)/B

Q: What notes are in the A m(addb9)/B chord?

The A m(addb9)/B chord uses the 4 notes of the A m(addb9) chord — A (Perfect unison), C (Minor third), E (Perfect fifth) and A# (Minor ninth) — with B played as the bass note in the lowest register.

The A m(addb9) chord consists of the A (Perfect unison), C (Minor third), E (Perfect fifth) and A# (Minor ninth) notes, with B as the bass note.

Piano keyboard showing the notes for a A m(addb9)/B chord

How to play the A m(addb9)/B chord

Play B 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 E (Perfect fifth) — 7 semitones above A
Add A# (Minor ninth) — 13 semitones above A
Press all 5 notes simultaneously to sound the A m(addb9)/B chord