Plain-Language Theory

Chord Builder

Learn how chords are built from intervals, triads, and modifications.

Chord Basics

How Chords Are Built

A chord is a group of three or more notes played together to create harmony. Every chord starts with a Root (note 1, the foundation that names the chord) and builds upward by counting scale steps from that root—not fret numbers.

Root (1)

The foundation note that names the chord.

3rd

The emotional key: a major 3rd sounds bright, while a minor 3rd (lowered 1 fret) sounds dark.

5th

The anchor note that gives the chord stability and structure.

7th / Extra

Flavor notes that add tension, warmth, or pull toward the next chord.

Chord type
Start here Most songs use these first.
More chord types Grouped by family
Triads
Seventh chords
9th & extended chords
Added notes
Altered & suspended
Neck view

Current chord

C Major

Chords rarely stand alone. The same shape can be the calm "home" chord in one song and the tense "almost there" chord in another, depending on the key. Scale Studio shows you which is which

Root order

What are we hearing?

Major triad

Start with the root, add a major 3rd, then add a perfect 5th.

Common sound: clear, stable, and familiar.

Some terms used here are explained in more detail in Dot Definitions.

Fretboard view

C shape in Standard GCEA (High G)

Root 3rd / sus 5th 6th / 7th 9th / 11th

Dots show every matching chord tone in this fret window. Press Play chord to light up the voicing that will play when it appears in this view.

This is a chord-tone map, not a promise that every cluster of dots is playable as a hand shape.