5-5 · 3-Note-Per-String: A Lens, Not a Cage

The last two lessons viewed the modes through lenses we have already studied. This lesson adds a new lens: the three-note-per-string system, usually abbreviated 3NPS. If you've heard of it before, it was almost certainly in the context of shredding — the predictable picking and legato patterns make 3NPS easy to play fast. Speed isn't the point here. We're interested in it as a navigation tool, and it's not a replacement for the rectangle and stack. It's another way of looking at the same notes that makes some things easier to see and easier to play.

3NPS is usually taught as seven separate six-string patterns to memorize. You don't need to do that, and if you learn it that way you'll miss the whole point. The entire system is built from the three-note fragments of 2-3.

Recall that each fragment is named for the scale degree of its lowest note, and that there are only three fingering shapes among the seven fragments:

Stack the fragments across the strings so each string picks up the scale where the last one left off, and you get a pattern that repeats every seven strings. The fingerings cluster conveniently: two strings of 1-2-4, then two of 1-3-4, then three of 1-3-5.

Read the scale degrees of the lowest note on each string, from bottom to top, and you get the sequence that runs the entire system.

Memorize this: The order of fragments as you move up the strings: 7-3-6-2-5-1-4. Memorize it both forward and backward — going down the strings, it reads 4-1-5-2-6-3-7.

The sequence looks random, but it isn't: moving up one string is the same as moving three steps forward in the scale, so the sequence just jumps through the scale three degrees at a time. Three fingering shapes and seven numbers in a fixed order — that's everything you have to memorize. From those, you can reconstruct any 3NPS pattern on the fly, on any guitar, no matter how many strings it has.

On a real fretboard, two shifts interrupt the vertical stacking, and it pays to keep them straight:

1. The warp. Crossing from the G string to the B string shifts everything one fret toward the bridge, exactly as it does for every other pattern in this course.
2. The 4-to-7 shift. Whenever you move up a string from Fragment 4 to Fragment 7, the new fragment shifts one fret toward the bridge (and coming down from 7 to 4, one fret toward the nut).

If the 4-to-7 move happens just as you are crossing the warp, the two shifts add up, and you get a two-fret shift.

To build a mode anywhere, put your index finger on the tonal center and start with the fragment whose number matches the mode: Fragment 1 for Ionian, 2 for Dorian, 3 for Phrygian, and so on. Build up or down from there by following the sequence. Here's the C major pattern that results from starting Fragment 1 on the C at the 5th fret of the G string and building outward in both directions:

You don't have to start with your index finger, either. Each scale degree occurs three times in the pattern — once as the first note on a string, once as the middle note, and once as the last. If the tonal center is under your little finger, subtract two from the mode's number and start with that fragment, placing its third note under your finger. If it is under your middle finger, subtract one and use the middle note. This works because fragment notes count up from the fragment's own number, wrapping from 7 back to 1.

One more connection worth seeing: the in-position patterns from 5-3, built from decorated rectangles and stacks, could all have been generated from a repeating five-string pattern — and that five-string pattern is just a truncated version of the seven-string 3NPS pattern (Fragments 7, 3, 6, and 2, plus the first two notes of Fragment 5).

Knowing this will come in handy when you want to switch between the two ways of looking at the scale. No one approach is the right answer: in-position patterns are compact, diagonal pathways connect them, and 3NPS will turn out to be especially strong for horizontal movement and melodic sequences, as we'll see in the next two lessons.

Exercise 5-4: Pick a tonal center on one of the lower strings, pick a mode, and set up a drone. Build the pattern upward using the 7-3-6-2-5-1-4 sequence, saying each fragment's number out loud as you play it. Then descend from a root on an upper string using 4-1-5-2-6-3-7. Finally, pick a tonal center on one of the middle strings and play all seven modes in that one spot, working down the brightness order and changing the drone as you go — for each mode, start with the matching fragment and play the fragments on the next higher and lower strings too, nine notes in all. In the 3NPS system, Locrian is just another mode: no special treatment required. Keep all of this slow. You're building the mental map everything else in this module uses.