Whole steps and half steps

Every melody you’ll learn in this school comes out of a seven-note pattern called the major scale. Before you learn finger shapes for it, you’re going to build it yourself on a single string — because on one string, the pattern is visible as plain distances.

Two sizes of step

Guitars measure melody in frets. Two frets up is a whole step (W). One fret up is a half step (H). Play A string fret 3, then fret 5: that’s a whole step. Fret 3 to fret 4: a half step — smaller, closer, a bit more tense. Those two step sizes are the only ingredients.

The recipe

The major scale is this exact sequence of steps:

W  W  H  W  W  W  H

Start anywhere, apply the recipe, and you get a major scale on that starting note. Start on C and you get the C major scale. On the A string, C sits at fret 3, so the whole scale lays out like this:

C major on the A string (one string, so steps = fret gaps)

note    C   D   E   F   G   A   B   C
fret    3   5   7   8   10  12  14  15
step      W   W   H   W   W   W   H
degree  1   2   3   4   5   6   7   8(=1)

Play it slowly, low to high. Watch your own hand: two frets, two frets, one fret, then three whole steps, then one fret to land. The half steps (E to F, B to C) are where the scale tightens up — listen for them.

Scale degrees

Musicians number the scale’s notes 1 through 7 — the degrees — and call the octave 8, which is just 1 again, higher. Play the scale again counting “1, 2, 3, 4, 5, 6, 7, 8” out loud instead of note names.

Degrees are worth the habit because they’re portable: “degree 5” means something in every key, while “the note G” is only degree 5 in the key of C. The chords you may know from the CAGED course live here too — a chord is built on a degree of some scale. Numbers are the language the rest of this course speaks.

Why it sounds finished

Try this: play degrees 1 up to 7 — and stop. Don’t play the last C. Let fret 14 ring.

Uncomfortable, isn’t it? Degree 7 sits a half step below home, and that closeness creates a pull your ear can’t ignore; musicians call 7 the leading tone because it leads. Now play the final C and feel the sentence end. That tension-and-release, built into the recipe by where the half steps fall, is why the major scale sounds “resolved” — and why melodies built from it feel like they’re going somewhere and then arriving.

One string was the laboratory. Next, you’ll play the same pattern the practical way: across all six strings in one position.