C#m7b5/A Guitar Chord

The C# half-diminished over A is a dominant chord. Explore fingerings, progressions, and theory analysis below.

Finger Positions

Dominant
C#m7b5/A diagram
Root Note C#
Name C# half-diminished over A
Intervals 1P-3m-5d-7m
Relative Minor A#m
Notes A, C#, E, G, B
Aliases C#m7b5, C#ø, C#-7b5, C#h7, C#h

Common Progressions Popular patterns using C#

I-V-vi-IV

C# → G# → A#m → F#

vi-IV-I-V

A#m → F# → C# → G#

Diatonic Family (Triads)

C# D#m Fm F# G# A#m Cdim

Diatonic Family (7ths)

C#maj7 D#m7 Fm7 F#maj7 G#7 A#m7 Cm7b5

Scale Compatibility

View All Scales
Minor Blues Locrian Locrian Pentatonic Super Locrian Pentatonic Altered Locrian #2 Locrian 6 Dorian #4 Hungarian Major Flamenco Bebop Locrian Half-Whole Diminished Composite Blues Messiaen's Mode #3 Chromatic

* 15 scales found containing the notes A, C#, E, G, B.

Audio & MIDI Analysis

MIDI Numbers 69, 61, 64, 67, 71
Frequencies (Hz)

440, 277.1826309768721, 329.6275569128699, 391.99543598174927, 493.8833012561241