Friday, November 6, 2009

Tritone scale

The tritone scale, C D(flat) E G(flat) G(natural) B(flat) is enharmonically equivalent to


the Petrushka chord, C C(sharp) E F(sharp) G A(sharp).


The two-semitone tritone scale, C D(flat) D F(sharp) G A(flat), is a symmetric scale


consisting of a repeated pattern of two semitones followed by a major third now used


for improvisation and may substitute for any mode of the jazz minor scale. The scale


originated in Nicolas Slonimsky's book Thesaurus of Scales and Melodic Patterns


through the, "equal division of one octave into two parts," creating a tritone, and the,


"interpolation of two notes," adding two consequent semitones after the two resulting


notes.

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