Diminished Fourth
Get Diminished Fourth essential facts below. View Videos or join the Diminished Fourth discussion. Add Diminished Fourth to your PopFlock.com topic list for future reference or share this resource on social media.
Diminished Fourth
diminished fourth
Inverseaugmented fifth
Other names-
Interval class4
Just interval32:25[2], 8192:6561
Equal temperament400
24 equal temperament400
Just intonation427, 384
Diminished fourth About this soundPlay .

In classical music from Western culture, a diminished fourth (About this soundPlay ) 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. The Pythagorean diminished fourth (F--, 8192:6561 = 384.36 cents), also known as the schismatic major third, is closer to the just major third than the Pythagorean major third.

The 32:25 just diminished fourth arises in the C harmonic minor scale between B and E.[5]About this soundPlay 

See also


  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 0-8247-4714-3. 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.
  5. ^ Paul, Oscar (1885). A manual of harmony for use in music-schools and seminaries and for self-instruction, p.165. Theodore Baker, trans. G. Schirmer.

  This article uses material from the Wikipedia page available here. It is released under the Creative Commons Attribution-Share-Alike License 3.0.



Music Scenes