The minor 9th arpeggio consists of the chord tones root (1), minor third (b3), fifth (5) and minor seventh (b7) which correspond to the notes A, C, E and G in the key of A minor. The resulting Am7/9 chord is arpeggiated by the orchestra right at the beginning of the piece, thus setting the composition's atmospherically tense mood.
The guitar line is made up of sequences that differ in their rhythmic shape in upward and downward motion, so no physical boredom arises. At two points a change to the dominant E major chord is inserted to enrich the harmony. Finally, in the second part, a few chromatic passing notes have crept in, elegantly connecting the arpeggios in half steps.
The minor major 9th arpeggio exercise is included in the Guitar Lovers Studies PDF or as play along track in the Jamtracks PDF which feature high graphic resolution for printing and integrated sound.