How do you play the A 7(alt)/Bb chord?

To play the A 7(alt)/Bb chord on piano, play the A 7(alt) chord (A, C#, E#, G and B#) with Bb as the lowest bass note. Place the Bb 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 7(alt)/Bb chord means a A 7(alt) chord with Bb in the bass.

A 7(alt)/Bb

Q: What notes are in the A 7(alt)/Bb chord?

The A 7(alt)/Bb chord uses the 5 notes of the A 7(alt) chord — A (Perfect unison), C# (Major third), E# (Minor sixth), G (Minor seventh) and B# (Minor tenth) — with Bb played as the bass note in the lowest register.

The A 7(alt) chord consists of the A (Perfect unison), C# (Major third), E# (Minor sixth), G (Minor seventh) and B# (Minor tenth) notes, with Bb as the bass note.

Piano keyboard showing the notes for a A 7(alt)/Bb chord

How to play the A 7(alt)/Bb chord

Play Bb as the lowest bass note in the left hand
Find A (Root) on the piano keyboard
Add C# (Major third) — 4 semitones above A
Add E# (Minor sixth) — 8 semitones above A
Add G (Minor seventh) — 10 semitones above A
Add B# (Minor tenth) — 15 semitones above A
Press all 6 notes simultaneously to sound the A 7(alt)/Bb chord

Inversions with same root

Bb m(maj13)