Major scale

In music theory, the major scale (or major mode) is one of the diatonic scales. It is often considered to be made up of eight notes (seven plus the octave), divided into two groups of four, the tetrachords. The pattern of steps in each tetrachord is, in ascending order:

tone, tone, semitone, (tone)

The major scale has eight notes (an octave), which in solfege are the syllables "Do, Re, Mi, Fa, Sol, La, Ti, and Do." At the piano keyboard, the simplest major scale is C major (see figure 1). It is unique in that it is the only major scale to use only the white notes on the keyboard and, likewise, no sharps or flats on the musical staff.

Figure 1. The C major scale

Listen to the C major scale.

When writing out major (and minor scales), every line and space on the stave has to be filled, and no note can have more than one accidental. This has the effect of forcing the key signature to feature just sharps or just flats; ordinary major scales never include both.

The major scale is the same as the Ionian mode.


Constructing major scales

Analyzing scales with sharps

Scales and key signatures are closely linked in music. It is necessary to construct a key signature - consisting of a number of sharps or flats - in order to know which notes a particular major scale will have. An easy, but time consuming, way to do this would be to use the pattern of tone/tone/semitone/etc... given above. If we choose to write the scale of D-major, we know immediately that the scale begins on a D. The next note will be a tone above - an E. The note after that will also be a tone above, however it is not simply an F as would seem obvious. Because the difference between an E and an F is actually a semitone (look on a piano keyboard, there is no 'black note' in-between them) it is necessary to raise the F to become an F-sharp to achieve a difference of a whole tone.

This could be followed to create a whole scale, with all the sharps (or with a different scale, flats) put correctly in. However a more clever way of constructing scales arises from analysing patterns in the whole series of major scales. Starting on the scale of C-major, there exists no sharps or flats. If you start a new scale on the 5th of C-major - G-major - you will find one sharp, augmenting the F. Starting the scale on the 5th of G major (a D) it will be necessary to put 2 sharps in - an F-sharp and a C-sharp. Writing this pattern out for all the scales looks like this:

C  maj - 0 sharps
G  maj - 1 sharp  - F# (meaning F-sharp)
D  maj - 2 sharps - F#, C#
A  maj - 3 sharps - F#, C#, G#
E  maj - 4 sharps - F#, C#, G#, D#
B  maj - 5 sharps - F#, C#, G#, D#, A#
F# maj - 6 sharps - F#, C#, G#, D#, A#, E#
C# maj - 7 sharps - F#, C#, G#, D#, A#, E#, B#

In this table it can be seen that for each new scale (starting on the fifth of the previous scale) it is necessary to add a new sharp. The order of sharps which need to be added follows: F#, C#, G#, D#, A#, E#, B#. This pattern of the sharps can be easily remembered through the use of the mnemonic:

  F       C      G    D   A   E     B
Father Charles Goes Down And Ends Battle

Looking closer, the last accidental added matches the tonic (first note) of the scale two-fifths before it (in this table, two lines up.) A useful rule for use in recognising major scales with sharps is that the tonic is also always one note above the last sharp.

Analysing major scales with flats

A similar table can be constructed for major scales with flats in them. In this case each new scale starts on the 5th below the previous one:

C  maj - 0 flats
F  maj - 1 flat  - Bb (meaning B-flat)
Bb maj - 2 flats - Bb Eb
Eb maj - 3 flats - Bb Eb Ab
Ab maj - 4 flats - Bb Eb Ab Db
Db maj - 5 flats - Bb Eb Ab Db Gb
Gb maj - 6 flats - Bb Eb Ab Db Gb Cb
Cb maj - 7 flats - Bb Eb Ab Db Gb Cb Fb

Here, a similar pattern can be recognised, each new scale keeps all the flats of the previous scale but adds a new one following the sequence: Bb, Eb, Ab, Db, Gb, Cb, Fb. Interestingly this is the direct inverse of the pattern of sharps given above. Luckily (!) the mnemonic can now be reversed to form the sentence:

   B    E    A   D    G      C       F
Battle Ends And Down Goes Charles' Father.

Again there is a similar, but reversed, relationship between tonics and accidentals. The tonic matches the second to last flat added on.

The circle of fifths

The information gathered from analysing scales can be used in constructing the circle of fifths:

Missing image

This is a useful way of finding key signatures of major scales. Starting clockwise from the top C each new letter represents a new scale, a fifth above the one before it. This means that each new scale (clockwise) requires an extra sharp to be added to its key signature. The exact sharps to be added are found by reading off the letters starting from the F (to the left of the C.) For example, if we needed to know how many, and which, sharps a scale of E major requires, we note that E is at position 4 - it requires 4 sharps. These sharps are (reading off from F): F#, C#, G#, D#. If you were faced with a key signature of 5 sharps, you would count off 5 from the top to arrive at B - it is the scale of B major.

Missing image

Fig 2. The B-major scale

Similarly, key signatures with flats can be created. Each new letter starting from F represents a new scale, and the position of the letter indicates how many flats it has. The actual flats are read anticlockwise from the Bb on position 2. Bb is on position 2, so it has 2 flats: Bb and Eb.

Harmonic properties

The major scale may predominate because of its unique harmonic properties. It allows:

  • major or minor chords, both stable and consonant, on every scale degree but the seventh
  • a diminished fifth in the seventh chord built on the fifth degree, the dominant
  • motion by a minor second from the leading tone to the tonic
  • root motion by fifths, the strongest root motion, from nearly every degree in either direction, the exceptions being up a fifth from the seventh degree, down a fifth from the fourth degree

Differences between major and minor

See major and minor.

de:Dur id:Skala mayor it:Scala maggiore ja:長音階 pl:Skala durowa


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