Lessons › Theory

Major scales and how they help you read

A major scale is the eight-note ladder that most melodies in a major key are built from. Knowing your scales tells you which notes to expect in a piece, and that makes reading faster and more accurate.

The pattern of steps

Every major scale follows the same pattern of whole steps (W) and half steps (H): W W H W W W H. A half step is the smallest distance on a piano, from one key to the very next. A whole step is two half steps.

C major uses only white keys, because the half steps fall naturally between E and F and between B and C. Start on any other note and you need sharps or flats to keep the same pattern.

From scales to key signatures

Build a major scale on G with the W W H W W W H pattern and you find that F has to become F♯. That one sharp is the key signature of G major. Build one on F and B has to become B♭: the key signature of F major.

Each sharp key adds one sharp as you go up in fifths: G (1), D (2), A (3), E (4), B (5), F♯ (6), C♯ (7). Each flat key adds one flat as you go down in fifths: F (1), B♭ (2), E♭ (3), A♭ (4), D♭ (5), G♭ (6), C♭ (7). This is the circle of fifths. The key signatures lesson shows how to name the key from the signature.

Scale degrees

Each note in the scale has a number, or degree. The first is the tonic, home. The fifth is the dominant, the strongest pull back to home. The seventh is the leading note, a half step below the tonic, which wants to rise to it. Singers often use solfège syllables for these degrees: do, re, mi, fa, so, la, ti, do.

Thinking in degrees is powerful for reading. A melody that runs 5-6-7-8 is climbing to home. One that sits on 1, 3 and 5 is outlining the home chord. Once you recognise those shapes, you read groups of notes instead of one note at a time.

Why scales help sight-reading

• You know which notes belong. In D major, every F and C is sharp. When you have played the scale, your hand and ear expect F♯ and C♯ before your eyes find them.
• Scale passages read as one shape. A run of stepwise notes is just part of a scale. Read the first and last note and the direction, and play the scale in between.
• Fingerings become automatic. On piano and many other instruments, scale fingerings carry over to the passages built from them.

Minor scales in brief

Each major key shares its key signature with a relative minor, which starts on the sixth degree. A minor shares C major’s empty key signature; E minor shares G major’s one sharp. Minor melodies often raise the seventh note with an accidental, so a G♯ appearing in a piece with no key signature is a strong hint that the piece is in A minor.

A practice routine

Play or sing the scale of the key before you read a piece in it. Two octaves up and down, slowly and evenly, takes under a minute and sets up both your hands and your ear.