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Am9b5 chord

A Half-Diminished 9th

Am9b5 · Piano chord

1A3b3C4b5Eb4b7G49B4
C31b3C4b79C5b5

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Notes

A – C – Eb – G – B

Formula

1 – b3 – b5 – b7 – 9

Practice Note

The half-diminished ninth is a minor-key ii chord commonly paired with Locrian natural 2.

Try next

Am7b5 · SimplerAm9 · SiblingD7b9 · Next in ii–VGm · ii–V–i target

About Am9b5

The Am9b5 chord sounds distinctive, with a half-diminished 9th character. Its notes are A, C, Eb, G, B.

All A chords (58)

Triads

A — MajorAm — MinorAdim — DiminishedAaug — AugmentedAsus2 — Suspended 2ndAsus4 — Suspended 4thA5 — Power Chord

7ths

A7 — Dominant 7thAmaj7 — Major 7thAm7 — Minor 7thAdim7 — Diminished 7thAm7b5 — Half-Diminished 7thA6 — Major 6thAm6 — Minor 6thA7sus4 — Dominant 7th Sus4A7sus2 — Dominant 7th Sus2

Extended

A9 — Dominant 9thAmaj9 — Major 9thAm9 — Minor 9thAadd9 — Add 9Aadd11 — Add 11Aadd2 — Add 2Aadd#11 — Add Sharp 11A11 — Dominant 11thA13 — Dominant 13thA6/9 — 6/9Amaj13 — Major 13thAm(add2) — Minor Add 2Am(add9) — Minor Add 9Am(add11) — Minor Add 11AmMaj7 — Minor Major 7thAm11 — Minor 11thAm13 — Minor 13thAm6/9 — Minor 6/9A7#11 — Dominant 7th Sharp 11A9#11 — Dominant 9th Sharp 11A13#11 — Dominant 13th Sharp 11A9sus4 — Dominant 9th Sus4A13sus4 — Dominant 13th Sus4Amaj7#11 — Major 7th Sharp 11Amaj9#11 — Major 9th Sharp 11AmMaj9 — Minor Major 9th

Altered

A7#9 — Dominant 7th Sharp 9A7b9 — Dominant 7th Flat 9A7#5 — Dominant 7th Sharp 5A7b5 — Dominant 7th Flat 5A7alt — Altered DominantA7#9#5 — Dominant 7th #9 #5A7b9b5 — Dominant 7th b9 b5A7#9b5 — Dominant 7th #9 b5A7sus4b9 — Dominant 7th Sus4 Flat 9A9#5 — Dominant 9th Sharp 5A9b5 — Dominant 9th Flat 5A13b9 — Dominant 13th Flat 9A7b13 — Dominant 7th Flat 13Aaug7 — Augmented 7thAdim(maj7) — Diminished Major 7thAaugMaj7 — Augmented Major 7th