Friday, November 6, 2009

Whole tone scale

In music, a whole tone scale is a scale in which each note is separated from its neighbours by the interval of a whole step. There are only two complementary whole tone scales, both six-note or hexatonic scales:


{C, D, E, F(sharp), G(sharp), A(sharp), C}


Synthesized sample


{B, D(flat), E(flat), F, G, A, B}.




The whole tone scale has no leading tone and because all tones are the same distance apart, "no single tone stands out, [and] the scale creates a blurred, indistinct effect". This effect is especially emphasized by the fact that triads built on such scale tones are augmented. Indeed, one can play all six tones of a whole tone scale simply with two augmented triads whose roots are a major second apart. Since they are symmetrical, whole tone scales do not give a strong impression of the tonic or tonality.




Due to this symmetry the hexachord consisting of the whole-tone scale is not distinct under inversion or more than one transposition. Thus many composers have used one of the "almost whole-tone" hexachords whose, "individual structural differences can been seen to result only from a difference in the 'location,' or placement, of a semitone within the otherwise whole-tone series."Alexander Scriabin's Mystic chord is a primary example, being a whole tone scale with one note raised a semitone, with this alteration allowing for a greater variety of resources through transposition.

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