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Augmented Seventh
In classical music from Western culture, an augmented seventh is an Interval (music), interval produced by Augmentation (music), widening a major seventh by a chromatic semitone. For instance, the interval from C up to B is a major seventh, eleven semitones wide, and both the intervals from C up to B, and from C up to B are augmented sevenths, spanning twelve semitones. Being augmented, it is classified as a consonance and dissonance, dissonant interval.Benward & Saker (2003), p.92. However, it is Enharmonic equivalence, enharmonically equivalent to the perfect octave. Since an Perfect octave, octave can be described as a major seventh augmented by a diatonic semitone, the augmented seventh is the sum of an octave, plus the difference between the chromatic and diatonic semitones, which makes it a highly variable quantity between one meantone temperament, meantone tuning and the next. In standard Equal temperament#Twelve-tone equal temperament, equal temperament, in fact, it is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Diminished Second
In modern Western tonal music theory, a diminished second is the interval produced by narrowing a minor second by one chromatic semitone.Bruce Benward and Marilyn Saker (2003). ''Music: In Theory and Practice, Vol. I'', p. 54. . Specific example of an d2 not given but general example of minor intervals described. In twelve-tone equal temperament, it is enharmonically equivalent to a perfect unison; therefore, it is the interval between notes on two adjacent staff positions, or having adjacent note letters, altered in such a way that they have no pitch difference in twelve-tone equal temperament. An example is the interval from a B to the C immediately above; another is the interval from a B to the C immediately above. In particular, it may be regarded as the "difference" between a diatonic and chromatic semitone. For instance, the interval from B to C is a diatonic semitone, the interval from B to B is a chromatic semitone, and their difference, the interval from B to C is a dimi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
