Chromatic fourth

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File:Chopin- Prelude in C Minor mm.5-6 chromatic run.png
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In music theory, a chromatic fourth, or passus duriusculus,[2] is a melody or melodic fragment spanning a perfect fourth with all or almost all chromatic intervals filled in (chromatic line). The quintessential example is in D minor with the tonic and dominant notes as boundaries:

<score lang="lilypond" vorbis="1"> \relative c{

  \new Staff \with {\remove "Time_signature_engraver" \clef bass }
  \time 11/4 
  \key d \minor
  d cis c b bes a bes b c cis d

} </score>

The chromatic fourth was first used in the madrigals of the 16th century.Script error: No such module "Unsubst". The Latin term itself—"harsh" or "difficult" (duriusculus) "step" or "passage" (passus)—originates in Christoph Bernhard's 17th-century Tractatus compositionis augmentatus (1648–49), where it appears to refer to repeated melodic motion by semitone creating consecutive semitones.[2] The term may also relate to the pianto associated with weeping.[2] In the Baroque, Johann Sebastian Bach used it in his choral as well as his instrumental music, in the Well-Tempered Clavier, for example (the chromatic fourth is indicated by the red notes):

<score lang="lilypond" vorbis="1"> \relative c'{

  \key d \minor
  \times 2/3 {[d16 e f]} \times 2/3 {[g f e]} \times 2/3 {[f g a]} \times 2/3 {[bes a g]} 
  a8 \override NoteHead.color = #red d cis c b bes a \override NoteHead.color = #black g ~ g f e a

} </score>

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This does not mean that the chromatic fourth was always used in a sorrowful or foreboding way, or that the boundaries should always be the tonic and dominant notes. One counterexample comes from the Minuet of Wolfgang Amadeus Mozart's String Quartet in G major, K. 387 (the chromatic fourths are conveniently bracketed by the slurs and set apart with note-to-note dynamics changes):

<score lang="lilypond" vorbis="1"> \relative c'{

  \key g \major
  \time 3/4 
  \set Staff.midiInstrument = #"violin"
  \p fis'( d) r d( b) r b( c \f cis \p d \f dis \p e) \f a,( \p bes \f b \p c \f cis \p d \f)

} </score>

Musical works using the chromatic fourth or passus duriusculus

File:Bwv614-preview.png
In the organ chorale prelude BWV 614, there are chromatic fourths in the three accompanying voices

References

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  1. Benward, Bruce, and Marilyn Nadine Saker. 2009. Music in Theory and Practice, p.216. Eighth edition. 2 vols. + 2 CD sound discs. Boston: McGraw-Hill. Template:ISBN.
  2. a b c d Monelle, Raymond (2000). The Sense of Music: Semiotic Essays, p.73. Template:ISBN.
  3. Williams, Peter (1998). The Chromatic Fourth: During Four Centuries of Music, p.69. Oxford University Press. Template:ISBN.