Watch the 4 Notes-Per-String Forms online guitar lesson by Brad Carlton from Guitar Lab: The Golden Arp

This lesson deals with four notes-per-string forms of the Add 9 arpeggio. Example two shows this in both tab and diagram form. The advantage of laying out an arpeggio along the string axis is that you can see the intervals quite clearly. Let's look at the first measure of example two, the open 6th string is the root, the F# in the second fret is the 9, the G# in the fourth fret is the 3 and the B in the seventh fret is the 5. Your fretting hand is stretched out to cover the 9 with your first finger, the 2 with your second finger and the 5 with your fourth finger. You may then tap the octave E (12th fret 6th string) if you so desire.

Let's observe the intervals: between the root and 2nd (9th) there will always be a major second interval (one whole step, 2 frets); between the 2 and 3 there will always be another major second interval; between the 3 and 5 there will always be a minor third interval (one and a half steps, 3 frets) and between the 5 and root there will always be a perfect fourth interval (2 and a half steps, 5 frets). Memorize these intervals as you will be able to apply them in all the various string layouts of the add 9 arpeggio.

This is a layout of a root position Add 9 arpeggio where the root is an open string and the form is 4 notes-per-string.

Example two shows all six arpeggios where the open string is the root. Not only can you play this 4 notes-per-string form with slurs and tapping but you will see demonstrations of how to apply legato slides and bending to this arpeggio form.