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Major Locrian scale

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Major Locrian scale

Major Locrian on C About this sound Play  .

In music, the major Locrian scale, also called the Locrian major scale, is the scale obtained by sharpening the second and third degrees of the Locrian mode. With a tonic of C, it consists of the notes C D E F G A B. It can be described as a whole tone scale extending from G to E, with F introduced within the diminished third interval from E to G. The scale therefore shares with the Locrian mode the property of having a diminished fifth above the tonic.

In English, Arabian scale may refer to what is known as the major Locrian scale.[1] A version of the major Locrian scale is listed as mode 3 in the French translation of Safi Al-Din's treatise Kitab Al-Adwar. This was a Pythagorean version of the scale.

Aside from this Arabic version, interest in the major Locrian is a phenomenon of the twentieth century, but the scale is definable in any meantone system. It is notable as one of the five proper seven-note scales in equal temperament, and as strictly proper in any meantone tuning with fifths flatter than 700 cents. If we take the tonic in the scale given above to be G rather than C, we obtain the leading whole-tone scale, which with a tonic on C is C D E F G A B; this can equally well be characterized as one of the five proper seven-note scales of equal temperament.

The major Locrian scale is the 5th mode of the Neapolitan major scale, which may be used in conjunction with the Neapolitan chord, but is not limited to it. This scale is also known as melodic minor 2.[2] Its modes and corresponding seventh chords are:

  1. melodic minor 2; Cmin/maj7
  2. leading whole-tone; Dmaj7(5)
  3. Lydian augmented dominant (5, 7); E7(#5)
  4. Lydian Dominant 6; F7
  5. major Locrian; G7(b5)
  6. Locrian 2 4; Am75 or A7+5
  7. Locrian double flat3; i.e., T, 2, double flat3, 4, 5, 6, 7; B7+5

The major Locrian scale has only two perfect fifths, but it has in some sense a complete cycle of thirds if one is willing to count a diminished third as a third: four major thirds, two minor thirds and a diminished third making up two octaves. In 12-equal temperament, the diminished third is enharmonically equivalent to a major second, but in other meantone systems it is wider and more nearly like a third.

The major Locrian in 12 equal temperament

Howard Hanson in his Harmonic Materials of Modern Music devotes several pages to the major Locrian,[3] or more precisely to its transpositional set class, a concept Hanson pioneered. He names this transpositional class the seven-tone impure major second scale, and notes that the various modes of the major Locrian can all be defined as the whole tone scale with one additional note, and where that note occurs does not affect the transpositional class. He also notes that the scale has the property that every three-note chord possible in the twelve tone chromatic scale already appears in the major Locrian.

Examples are given of the use of this scale by Claude Debussy in his opera Pelléas et Mélisande and Alban Berg in his song "Nacht".

References

  1. ^ Christiansen, Mike (2003). Mel Bay Complete Guitar Scale Dictionary, p.41. ISBN 0-7866-6994-2.
  2. ^ "Neapolitan Scale and Its Modes", GNU Solfege 3.22 user's manual.
  3. ^ Hanson, Howard (1960). Harmonic Materials of Modern Music, . Appleton-Century-Crofts. ISBN 978-0891972075.

Further reading

  • Hewitt, Michael (2013). Musical Scales of the World. The Note Tree. ISBN 978-0957547001.
  • d'Erlanger, Rodolfe (1938). La Musique Arab, vol. 3, . Librarie Orientaliste Paul Geunther.
  • Persichetti, Vincent (1961). Twentieth-Century Harmony, W. W. Norton & co. ISBN 978-0393095395/ISBN 9780571112166.
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