Extended intervals |

Extended intervals – intervals that are a semitone wider than the large and clean ones of the same name. In the diatonic The system contains one increased interval – an increased quart (tritone) at the IV degree of the natural major and the VI degree of the natural minor. In harmonic. major and minor also contain an interval of an increased second (on the VI degree). U. and. are formed from an increase in chromatic. semitone of the top of a large or pure interval or from a decrease in chromatic. semitone of its base. At the same time, the tone value of the interval changes, while the number of steps included in it and, accordingly, its name remain the same (for example, a major second g – a, equal to 1 tone, turns into an increased second g – ais or ges – a, equal to 1 ? tones, enharmonically equal to the minor third). When the increased interval is reversed, a reduced interval is formed, for example. an augmented third turns into a diminished sixth. Like simple intervals, compound intervals can also be increased.

With a simultaneous increase in the top and a decrease in the base of the interval by chromatic. a semitone forms a double-increased interval (for example, a pure fifth d – a, equal to 3 1/2 tones, turns into a double-increased fifth des-ais, equal to 41/2 tones, enharmonically equal to a major sixth). A doubly enlarged interval can also be formed by raising the top of the interval or by lowering its base by chromatic. tone (for example, a major second g – a turns into a twice increased second g – aisis or geses – a, equal to 2 tones, enharmonically equal to a major third). When reversing a twice-increased interval, a twice-decreased interval is formed.

See Interval, Interval Reversal.

V. A. Vakhromeev