E
F
F#
G
G#
A
C#
C
C#
D
D#
E
G#
G#
A
A#
B
C
E
D#
E
F
F#
G
A#
A#
B
C
C#
D
X
F
F#
G
G#
A
1
2
3
4
5
A#m7b5
Half-diminished7Also known as: Bbm7b5
About this chord
A#m7b5 (A# half-diminished, Bbm7b5 enharmonic) has a smoky, suspenseful, bittersweet tone—cool, tense, and melancholic. Favored in jazz standards, noir film-score cues, blues turnarounds, classical modal writing, and avant-garde textures. Sophisticated voicings, often barre-friendly, demand careful voice-leading. Works as a leading, unstable pre-dominant, creating yearning tension that resolves.
Intervals
1♭3♭5♭7
Tuning
StandardE B G D A E
Position Frets 1 - 5
Tags
jazzclassicalbluesavant-gardefilm-score