Cell 1 · T–T
tone, tone · spans 4 frets
Widest shape. Three notes a whole step apart each — e.g. frets 1·3·5. The "stretchy" one.
Fretboard diagrams · the system + the strange
The whole major-scale system reduces to three little three-note shapes. Plus the outlandish scales drawn on the neck, and the strange chords as boxes. Diagrams read low-E on top. Tap dots and chords to hear them.
Play any major scale three notes per string and every string holds one of only three spacing shapes. That's the whole secret the video was selling: learn these three, learn how they chain, and you own all seven modes across the entire neck. The gaps are tone (T = 2 frets) or semitone (S = 1 fret).
Widest shape. Three notes a whole step apart each — e.g. frets 1·3·5. The "stretchy" one.
Whole step then half step — frets 1·3·4. The half-step sits at the top of the string.
Half step then whole step — frets 1·2·4. The half-step sits at the bottom of the string.
That's it — T–T, T–S, S–T. The major scale's step formula (T T S T T T S) is just these three cells dealt out across the six strings. There is no fourth shape.
Here's the 3-notes-per-string major scale on the full neck, each string coloured by which cell it uses. You can literally see the three shapes repeating. Change the root; tap any dot.
The strange ones drawn as fretboard diagrams with interval labels. Pick one, pick a root, tap dots or hear it climb.
Voicings that break the stacked-thirds rule. Boxes read low-E on the left. Tap to strum.