A♭ 13th Banjo Chord

also known as A♭13, A♭dom13, A♭ dominant 13th

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

Diagram of an A♭ 13th banjo chord at the 4 fret (third inversion)

Notes in an A♭ 13th Banjo chord

Root : A♭

3rd : C

5th : E♭

Dominant 7th : G♭

9th : B♭

13th : F

A♭13/G♭

Diagram of an A♭ 13th banjo barre chord at the 1 fret (third inversion)

A♭13/G♭

Thirteenth

In music or music theory, a thirteenth is the interval between the sixth and first scale degrees when the sixth is transposed up an octave, creating a compound sixth, or thirteenth. A thirteenth chord is the stacking of six (major or minor) thirds, the last being above the 11th of an eleventh chord. Thus a thirteenth chord is a tertian (built from thirds) chord containing the interval of a thirteenth, and is an extended chord if it includes the ninth and/or the eleventh. The jazzy thirteenth is a very versatile chord and is used in many genres. Since 13th chords tend to become unclear or confused with other chords when inverted, they are generally found in root position.