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Microtonality is the use in music of microtones — intervals smaller than a semitone, also called "microintervals".It may also be extended to include any music using intervals not found in the customary Western tuning of twelve equal intervals per octave.
This notation was also used to notate music for the viola d'amore, an instrument played and composed for by composers such as Biber and Vivaldi. The viola d'amore used a great number of different tunings and writing music for it in scordatura notation was a natural choice for composers of the time.
Sonido 13 is a theory of microtonal music created by the Mexican composer Julián Carrillo around 1900 [1] and described by Nicolas Slonimsky as "the field of sounds smaller than the twelve semitones of the tempered scale." [2] Carrillo developed this theory in 1895 [3] while he was experimenting with his violin.
The definition of "microtonailty" is given in the first sentence of the article: "Microtonal music is music using microtones—intervals of less than an equally spaced semitone." It has nothing to do with tonality, atonality, bitonality, or any similar terms.
These etudes bring out connections and resemblances to twelve-tone music as well as various xenharmonic characteristics, reflected in Twelve Microtonal Etudes for Electronic Music Media. About his 16-tone etude, Blackwood wrote: [4] This tuning is best thought of as a combination of four intertwined diminished seventh chords.
Harry Partch (June 24, 1901 – September 3, 1974) was an American composer, music theorist, and creator of unique musical instruments.He composed using scales of unequal intervals in just intonation, and was one of the first 20th-century composers in the West to work systematically with microtonal scales, alongside Lou Harrison.
Again, this may be a microtonal, almost imperceptible affair, or it may be a slur between notes a semitone apart, so that there is actually not one blue note but two. A blue note may even be marked by a microtonal shake of a kind common in Oriental music. The degrees of the mode treated in this way are, in order of frequency, the third, seventh ...
His professional debut (12 note ET music) occurred on a Composers Forum program in New York, 1959. In 1960, compelled by his ear, he began writing microtonal music, and continued to do so for the rest of his life, with the occasional exception being taped music for dancers.