How to Play Piano Chord: A half-diminished 11 — root

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Am11♭5

root position

A half-diminished 11

root position

A, C, D♯, G, B, D

The notes of the A major scale are:

Major scale pattern

The semitone pattern for a major scale is:

WWHWWWH

where:

1, ♭3, ♭5, ♭7, 9, 11

G major A · G

G–B–D = ♭7, 9, 11 · left hand: root + ♭7

a major triad a whole step down from the root
C minor A · G

C–D♯–G = ♭3, ♭5, ♭7 · left hand: root + ♭7

The keyboard can of every chord — change it any time in Preferences.