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Prelude and Fugue in C-sharp major, BWV 872

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Prelude and Fugue in C-sharp major, BWV 872, is a keyboard composition written by Johann Sebastian Bach. It is the third prelude and fugue in the second book of The Well-Tempered Clavier, a series of 48 preludes and fugues in every major and minor key.

Analysis[edit]

Prelude[edit]

The prelude is in common time and has 50 measures, built upon the characteristic arpeggios similar to the famous C major prelude from the first book of The Well-Tempered Clavier until the fugato.[1]


\version "2.18.2"
\header {
  tagline = ##f
}

upper = \relative c' {
  \clef treble 
  \key cis \major
  \time 4/4
  \tempo 4 = 80
  \set Staff.midiInstrument = #"harpsichord"

   %% PRÉLUDE CBT II-3, BWV 872, ut-dièse majeur
   \repeat unfold 2 { << { r16 eis gis cis~ cis4 } \\ { s4 gis16 fis gis eis } >> }
   << { r16 fis16 ais cis~ cis4 r16 fis, gis dis'~ dis4 } \\ { s4 ais16 gis ais fis s4 gis16 fis gis fis } >>
   << { r16 eis16 gis dis'~ dis4 r16 eis,16 gis cis~ cis4 } \\ { s4 gis16 fis gis fis s4 gis16 fis gis eis } >>
   << { r16 dis16 fisis ais~ ais4 r16 dis,16 gis bis~ bis4 } \\ { s4 fisis16 eis fisis dis s4 gis16 fisis gis dis } >>
   << { r16 eis16 ais cis~ cis4 r16 dis,16 ais' cis~ cis4 } \\ { s4 ais16 gis ais eis s4 ais16 gis ais dis, } >>
}

lower = \relative c {
  \clef bass 
  \key cis \major
  \time 4/4
  \set Staff.midiInstrument = #"harpsichord" 
    
   << { gis'8 gis cis cis b b b b ais ais fis fis \repeat unfold 4 { bis } \repeat unfold 4 { cis } gis gis eis eis | ais ais ais ais gis gis dis gis | \repeat unfold 4 { gis } \repeat unfold 4 { fisis } | } \\ { \repeat unfold 3 { \repeat unfold 2 { cis4 r4 } } cis4 r4 bis r4 ais r4 dis } >>
    
}

\score {
  \new PianoStaff <<
    \set PianoStaff.instrumentName = #"BWV 872"
    \new Staff = "upper" \upper
    \new Staff = "lower" \lower
  >>
  \layout {
    \context {
      \Score
      \remove "Metronome_mark_engraver"
    }
  }
  \midi { }
}

The arpeggios ends at m. 25, and the fugato starts, which uses the time signature of 3
8
. It has three voices.[1]


\version "2.18.2"
\header {
  tagline = ##f
}

Mordaesq = { \tag #'print { gis4~_\mordent_\markup { \natural } } \tag #'midi { gis32 fis gis16~ gis8~ }  }
Mordeesq = { \tag #'print { dis4~_\mordent_\markup { \natural } } \tag #'midi { dis32 cis dis16~ dis8~ }  }

upper = \relative c'' {
  \clef treble 
  \key cis \major
  \time 3/8
  \tempo 8 = 152
  \set Staff.midiInstrument = #"harpsichord" 
  %\context Score \applyContext #(set-bar-number-visibility 2)
  \set Score.currentBarNumber = #25
  \bar ""
   %% PRÉLUDE CBT II-3, BWV 872, ut-dièse majeur
   \bar "||"
   < gis dis bis >8^\markup{Allegro} dis16[ cis dis \tempo 8 = 120 eis] \tempo 8 = 40 \grace eis8 \tempo 8 = 152 fis4.~ fis8 eis-! ais-! dis,8 \Mordaesq gis8 fis16 eis fis gis eis4. dis8 gis16 fisis gis ais bis
}

lower = \relative c {
  \clef bass 
  \key cis \major
  \time 3/8
  \set Staff.midiInstrument = #"harpsichord" 
    
   << { gis'8 r8 r8 | r8 ais16 gis ais \tempo 8 = 120 bis \tempo 8 = 40 \grace bis8 \tempo 8 = 152 cis4.~ cis8 bis eis ais, \Mordeesq dis8 \stemDown \change Staff = "upper" cis4~ cis8 \change Staff = "lower" \stemUp bis16 ais bis cis dis8 } \\ { gis,,8 r8 r8 R4.*4 r8 eis'16 dis eis fis gis4.~ gis8 } >>
    
}

 thePianoStaff = \new PianoStaff <<
    \set PianoStaff.instrumentName = #""
    \new Staff = "upper" \upper
    \new Staff = "lower" \lower
  >>

\score {
  \keepWithTag #'print \thePianoStaff
  \layout {
    \context {
      \Score
      \remove "Metronome_mark_engraver"
    }
  }
}

\score {
  \keepWithTag #'midi \thePianoStaff
  \midi { }
}

Fugue[edit]

The fugue has three voices and 35 measures.[1] The subject is simply made from notes from the major triad, but has mutated many times throughout the whole fugue.[2]


\version "2.18.2"
\header {
  tagline = ##f
}

\score {
  \new Staff \with {

  }
<<
  \relative c {
    \clef bass 
    \key cis \major
    \time 4/4
    \set Staff.midiInstrument = #"harpsichord"

     %% SUJET fugue CBT II-3, BWV 872, ut-dièse majeur
     r8 cis8 eis cis gis' r8 fis r8 | eis16 dis cis8~ cis16 dis eis cis | fis8

  }
>>
  \layout {
     \context { \Score \remove "Metronome_mark_engraver" }
  }
  \midi {} 
}

References[edit]

  1. ^ a b c "Bach: Prelude and Fugue No.3 in C♯ major, BWV 872 Analysis". Tonic Chord. 2018-05-08.
  2. ^ Ledbetter (2002), pp. 249–251

Bibliography[edit]