A Minor 7th, Flat 5th Banjo Chord

also known as A half-diminished 7th, A half-diminished

your first finger goes on the fourth fret of the second string
your second finger goes on the fifth fret of the third string
your third finger goes on the fifth fret of the first string
your fourth finger goes on the seventh fret of the fourth string

Diagram of an A minor 7th, flat 5th banjo chord at the 4 fret

Notes in an A Minor 7th, Flat 5th Banjo chord

Root : A

Minor 3rd : C

Diminished 5th : D#

Minor 7th : G

Am7♭5

Diagram of an A minor 7th, flat 5th banjo barre chord at the 10 fret (first inversion)

Am7♭5/C

Diagram of an A minor 7th, flat 5th banjo chord at the 7 fret

Am7♭5

Diagram of an A minor 7th, flat 5th banjo chord at the 4 fret (third inversion)

Am7♭5/G

Diagram of an A minor 7th, flat 5th banjo chord at the 10 fret (second inversion)

Am7♭5/D#

Half-diminished seventh chord

In music theory, the half-diminished seventh chord (also known as a half-diminished chord or a minor seventh flat five chord) is a seventh chord composed of a root note, together with a minor third, a diminished fifth, and a minor seventh. In diatonic harmony, the half-diminished seventh chord occurs naturally on the seventh scale degree of any major scale (for example, Bø7 in C major) and is thus a leading-tone seventh chord in the major mode. Similarly, the chord also occurs on the second degree of any natural minor scale. It has been described as a "considerable instability."