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Major scale

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A major scale is a specific sequence of musical notes. It contains a major triad on its first note, known as the tonic.

Major scale1
Major scale1

This scale is a type of diatonic scale. Most people call it the natural major scale. It is also known as the Ionian mode. This scale is a fundamental building block in Western music. It is used frequently in popular music and classical works. Many cultures recognize these sounds. In Carnatic music, it is called Sankarabharanam. In Hindustani classical music, it is called Bilaval.

To build a major scale, you must follow a strict pattern of intervals. These intervals are called whole tones and semitones. A semitone is a half step. A whole tone is a whole step.

C major scale
C major scale

The pattern of these steps is: whole, whole, half, whole, whole, whole, half. You can also view the scale as two identical tetrachords. A tetrachord is a group of four notes. Each tetrachord follows the pattern: whole, whole, half. These two groups are separated by one whole tone. This specific structure makes the scale maximally even.

Musicians use specific names for the seven notes in the scale. The first note is the tonic. The second note is the supertonic. The third is the mediant. The fourth is the subdominant. The fifth is the dominant. The sixth is the submediant. The seventh is the leading tone. The eighth note is a repeat of the tonic. This eighth note is called an octave. The word comes from the Latin "octavus," meaning eighth. The frequency of this note is exactly double the first note.

These notes create different types of harmony. You can build triads, which are three-note chords, on each scale degree. The first, fourth, and fifth degrees create major triads. The second, third, and sixth degrees create minor triads. The seventh degree creates a diminished triad.

C major scale
C major scale

Musicians also build seventh chords. The first, fourth, and fifth degrees form major seventh chords. The second, third, and sixth degrees form minor seventh chords. The fifth degree forms a dominant seventh chord. The seventh degree forms a half-diminished seventh chord.

Scale construction involves mathematical ratios. In equal temperament, a whole tone has twice the frequency ratio of a semitone. An octave consists of twelve equal semitones. The frequency doubles as you move from one octave to the next. Certain intervals have specific ratios. For example, a perfect fifth has a ratio of 3/2, or 1.5. A major third has a ratio of 5/4, or 1.25. These mathematical relationships define the sound of the scale.

Different keys use different notes. The C major scale is the simplest to write. It is the only major scale without sharps or flats. On a piano, it uses only the white keys.

Major scale1
Major scale1

If a piece is in E major, it uses seven specific pitches. These are E, F#, G#, A, B, C#, and D#. The notes outside this scale are called chromatic notes. The key signature for E major contains three sharps. Musicians use the circle of fifths to organize these keys. This circle shows how many sharps or flats a key requires.

There are many variations of the major scale. The Lydian and Mixolydian modes are also major diatonic modes. Some scales are more complex. The harmonic major scale includes a minor sixth. The melodic major scale changes depending on if the notes go up or down. The double harmonic major scale has a minor second and a minor sixth. Even gapped scales, like the pentatonic scale, can appear in a major style. All these variations allow musicians to create endless musical colors.

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