What is a scale?
An ordered set of notes that starts from a tonic and follows a fixed pattern of whole and half steps.
Essential
Content under musical review. It may contain inaccuracies.
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An ordered set of notes that starts from a tonic and follows a fixed pattern of whole and half steps.
Essential
A scale is a collection of notes arranged by pitch. It starts on a reference note, the tonic, and moves up through a fixed pattern of distances. That pattern gives the scale its character: two scales on the same tonic can sound bright, dark or tense just because a few steps change.
First, every available note, one half step at a time (the chromatic scale):
Now just seven of them, chosen with a specific pattern (the major scale):
And a five-note selection (the major pentatonic):
All three start and end on C, yet each one sounds different.
On the fretboard, a scale is a pattern of dots that repeats every twelve frets. Here is the C major scale with each degree number:
String 6, Open: E2 · 3 · Third
Notice that between degrees 3 and 4, and between 7 and 1, there is no empty fret: those are half steps.
Change the tonic and the scale in the explorer. The pattern moves around the neck, but the distances stay the same:
Explore scalesC
String 5, Fret 3: C3 · 1 · Root
A scale answers three practical questions:
Scales are described by a formula of degrees from the tonic, or by a sequence of steps:
| Scale | Formula | Steps |
|---|---|---|
| Major | 1 2 3 4 5 6 7 | W W H W W W H |
| Natural minor | 1 2 b3 4 5 b6 b7 | W H W W H W W |
| Major pentatonic | 1 2 3 5 6 | W W W+H W W+H |
Seven-note scales use each letter once. That's why G major contains F♯ and not G♭: the scale already has a G.
Play the major scale on the second string, from fret 1 (C) up to fret 13. Follow W W H W W W H: a whole step is two frets, a half step is one. Seeing the pattern "in a line" first makes position fingerings easier later, where the same scale is spread across several strings.
Scales, arpeggios & fretboardScale sequencesPlay melodic patterns (thirds, groups…) to master the scale in one position.A scale is not the same as a key. The scale is the material; the key adds hierarchy: a tonic acting as the centre and chords with functions (tonic, predominant, dominant). The seven notes of C major also serve A minor or D dorian: the centre changes, not the collection.
Scales are often grouped by size: pentatonic (5 notes), hexatonic (6, such as whole-tone), heptatonic (7, such as the major scale and its modes) and octatonic (8, such as the diminished scale). The fewer notes and half steps a scale has, the fewer internal clashes it creates.