To play the Ab6 chord, perform a barre by pressing your index finger on the top g-string and E-string on the 1st fret, ring finger on the 3rd fret of the C-string, and little finger on the 3rd fret of the bottom A-string.
The Ab6 chord (also known as the G#6 chord) contains the notes Ab-C-Eb-F.
To build an Ab6 chord, take the added sixth chord formula (1-3-5-6) and apply it to the Ab major scale (Ab, Bb, C, Db, Eb, F, G).
Identify the first, third, fifth, and sixth scale degrees in the Ab major scale, which are Ab-C-Eb-F, giving you an Ab6 chord.
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