A compact half-diminished — the ii of G minor.
Notes: A – D# – G – C · Formula: 1 – ♭3 – ♭5 – ♭7
Load A Half-Diminished (Am7b5) onto an interactive fretboard, hear every note, and build it into a progression.
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A A Half-Diminished (Am7b5) chord contains the notes A, D#, G, C. It is built from the half-diminished formula 1 - ♭3 - ♭5 - ♭7, with A as the root.
They share the same four notes (A-C-E♭-G), so they're enharmonic inversions of each other — Am7b5 is a Cm6 with A in the bass. Which name you use depends on function: call it Am7b5 when A is the root and it's acting as a ii chord, and Cm6 when C is the root.