
The "tune" by JS Bach, on which his 32 Goldberg Variations are based. This is in Dropped D tuning and is an arrangement of a piece written for keyboard. On a keyboard we have "left hand" and "right hand" notes - basically in this piece the left hand plays the bass while the right plays the melody. That distinction breaks down in the guitar world as any fretted note involves both hands. The issue then, is to have two lines (melody and accompaniment) moving differently, almost independently, yet combining to make one whole. Tricky but beautiful.