Diminished fourth

diminished fourth

Inverse	augmented fifth
Name
Other names	-
Abbreviation	d4[1]
Size
Semitones	4
Interval class	4
Just interval	32:25[2]
Cents
Equal temperament	400
24 equal temperament	400
Just intonation	427

Diminished fourth  Play (help·info).

In classical music from Western culture, a diminished fourth ( Play (help·info)) is an interval produced by narrowing a perfect fourth by a chromatic semitone^[1][3]. For example, the interval from C to F is a perfect fourth, five semitones wide, and both the intervals from C♯ to F, and from C to F♭ are diminished fourths, spanning four semitones. Being diminished, it is considered a dissonant interval^[4].

A diminished fourth is enharmonically equivalent to a major third; that is, it spans the same number of semitones, and they are physically the same pitch in twelve-tone equal temperament. For example, B–D♯ is a major third; but if the same pitches are spelled B and E♭, as occurs in the C harmonic minor scale, the interval is instead a diminished fourth. In other tunings, however, they are not necessarily identical. For example, in 31 equal temperament the diminished fourth is slightly wider than a major third, and is instead the same width as the septimal major third.

Sources

1. ^ ^{a b} Benward & Saker (2003). Music: In Theory and Practice, Vol. I, p.54. ISBN 978-0-07-294262-0. Specific example of an d4 not given but general example of perfect intervals described.
2. ^ Haluska, Jan (2003). The Mathematical Theory of Tone Systems, p.xxv. ISBN 0824747143. Classic diminished fourth.
3. ^ Hoffmann, F.A. (1881). Music: Its Theory & Practice, p.89-90. Thurgate & Sons. Digitized Aug 16, 2007.
4. ^ Benward & Saker (2003), p.92.

This music theory article is a stub. You can help Wikipedia by expanding it.v · Categories: Intervals Music theory stubs Wikimedia Foundation. 2010. Игры ⚽ Нужно решить контрольную? Ariel Sorin Terry Fox Drive Look at other dictionaries: diminished fourth — noun A musical interval of the Western twelve semitone system consisting of four semitones and spanning four degrees of the diatonic scale. It is one semitone narrower than a perfect fourth and enharmonically equivalent to a major third …   Wiktionary Diminished unison — Inverse augmented octave Name Other names augmented unison (depending on context) Abbreviation dim1 Size Semitones …   Wikipedia Diminished second — Inverse augmented seventh Name Other names Abbreviation d2[1] Size …   Wikipedia Diminished third — Inverse augmented sixth Name Other names Abbreviation d3[1] Size …   Wikipedia Diminished seventh chord — on C  Play ( …   Wikipedia Diminished seventh — Inverse augmented second Name Other names Abbreviation d7[1] Size …   Wikipedia Diminished sixth — Inverse augmented third Name Other names Abbreviation d6[1] Size …   Wikipedia Diminished octave — Inverse augmented unison Name Other names Abbreviation d8[1] Size …   Wikipedia Fourth wall — The fourth wall is the imaginary wall at the front of the stage in a proscenium theater, through which the audience sees the action in the world of the play. It was made explicit by Denis Diderot [ The Fourth Wall and the Third Space by John… …   Wikipedia diminished fifth — noun A type of tritone in musical composition comprising of six semitones. It spans five diatonic scale degrees like a perfect fifth but narrower by a semitone. The number of diatonic degrees it spans is what distinguishes it from an augmented… …   Wiktionary 18+ © Academic, 2000-2024 Contact us: Technical Support, Advertising Dictionaries export, created on PHP, Joomla, Drupal, WordPress, MODx. Mark and share Search through all dictionaries Translate… Search Internet Share the article and excerpts Direct link … Do a right-click on the link above and select “Copy Link”