J S Bach · Ein feste Burg, (BWV 80)

Aria Movement 2

3 min readLast updated November 2026

Dynamics

  • Likely terraced dynamics typical of Baroque performance practice
  • Contrast between:
    • Energetic ritornello sections (Bars 1–8, 69–76)
    • More text-driven vocal passages (Bars 9 onwards)
  • Dotted rhythms used to add emphasis and majesty (Bar 45)

Rhythm / Tempo / Metre

  • Orchestral Intro
    • Moto perpetuo from upper strings which play a lively semiquaver string accompaniment
    • Lower strings accompny with Strong quaver baseline often starting on the offbeat, descending sequence
    • Intricate decorative passagework includes demisemiquavers,dotted rythms and syncoptations(is the ritornelo)
  • Common time (4/4) throughout
  • Opening ritornello features continuous moto perpetuo semiquavers in upper strings (Bars 1–8)
  • Strong quaver bass line, often starting on the offbeat (Bars 1–8)
  • Bass solo line predominantly semiquaver-based and highly melismatic (Bars 9–10)
  • Demisemiquavers used in decorative vocal passagework
  • Syncopation in bass and accompaniment
  • Descending sequence in continuo (Bar 19)
  • Dotted rhythms added for emphasis in soprano (Bar 45)

Texture

  • 7 parts: Violin I, Violin II, Viola (in unison), Oboe, Soprano, Bass, Continuo
    • Violone likely doubles continuo bass line at lower octave
  • Orchestral introduction and postlude:
    • Melody-dominated homophony
    • Upper strings: semiquaver triadic leaping figures
    • Lower strings/continuo: quaver offbeat leaps and walking bass (Bars 1–8, 69–76)
  • From vocal entry:
    • Highly contrapuntal texture between soprano and bass (Bars 9–23)
    • Soprano sings ornamented cantus firmus
    • Bass sings independent, ornate aria line
  • Heterophonic texture between soprano and oboe:
    • Oboe doubles soprano which provides the chorale melody with written-out ornamentation
    • Creates slight ornamental divergence (e.g. trill, Bar 26)
  • Continuous contrapuntal interplay between soprano and bass throughout

Structure

  • Ritornello-based structure (concerto-like design)
  • Bars 1–8: Orchestral introduction (ritornello)
    • Establishes D major
    • Modulates to A major (Bar 4)
    • Briefly passes through G major (Bar 5)
    • Returns to D major
  • Bars 9–23:
    • Bass enters first with ornate melismatic scalic semiquavers (Bar 9)
    • Soprano enters one bar later with embellished cantus firmus (phrases 1–2)
    • Modulates to A major (Bar 12)
    • Soprano presents embellished phrase 2 of chorale (Bar 15)
    • Bass solo passage from Bar 19 onwards
  • Bars 24–37:
    • Repeat of Bars 10–23 with slight variations
    • Recomposition of earlier melisma to elide(join) sections (Bar 24)
  • Bars 37–60:
    • Begins in D major
    • Modulates to A major (Bar 38)
    • Rapid modulation through closely related keys:
      • B minor (Bar 53)
      • F# minor (Bar 60)
    • Covers phrases 5–8 of chorale
  • Bars 60–69:
    • Return to D major
    • Orchestra recalls opening material
    • Soprano sings developed version of cantus firmus (phrase 9)
    • Simultaneous chromatic movement in soprano with semiquaver motion in bass
  • Bars 69–76:
    • Full return of orchestral ritornello in D major

Melody

  • Soprano:
    • Highly decorated, conjunct variation of chorale(the first two phrases)
    • Elaborates chorale with:
      • Auxiliary notes
      • Échappée notes
      • Turn figures
      • Anticipation note (end of Bar 12)
    • Trill on cadence formula typical of Baroque practice (Bar 26)
    • Dotted rhythms to emphasise text (Bar 45)
    • Range: ninth (D–E)
  • Bass: (sings a poem: related idea)(In the begigining its more melismatic and then later on it becomes more angular
    • Highly melismatic, quasi-operatic coloratura
    • Ornate scalic semiquavers (Bars 9–10)
    • Outlines 7ths melodically (Bars 10, 12, 14)
    • Sequence in bar 25
    • Expressive 4–3 suspension on “geboren” (Bar 14)
    • Ascending arpeggiated figure on “is for Victory” (Bar 18)
    • More angular writing from (Bars 51–52 :Phrases 7-8.The Devil
      • Intervals of 5ths,6ths,7ths
    • New jubilant melodic idea introduced (Bar 47)
    • Range: large (F#–E, approx. 13th)
  • Oboe:
    • Doubles soprano chorale line with ornamentation
    • Ascending scalic run into (Bar 24)
  • Limited sequential writing:
    • Descending sequence in continuo (Bar 19)
    • Ascending Sequence in the bass bar 25

Instrumentation (Sonority)

  • Duet aria for soprano and bass with:
    • String ensemble (violins and viola in unison)
    • Solo oboe
    • Continuo (organ + cello/violone)
  • Oboe doubles soprano chorale melody, reinforcing pitch and ornamentation
  • Strings provide:
    • Continuous semiquaver motion in ritornello
    • Unison accompaniment beneath bass solo
  • Bass line largely independent from soprano

Tonality

  • Overall key: D major
  • Bars 1–8:
    • D major
    • Modulation to A major (Bar 4)
    • Brief G major (Bar 5)
    • Return to D
  • Bars 9–23:
    • D major moving to A major (Bar 12)
  • Bars 37–60:
    • D major → A major (Bar 38)
    • B minor (Bar 53)
    • F# minor (Bar 60)
  • Bars 62–76:
    • Return to D major
  • Use of closely related keys throughout

Harmony

  • Primarily functional harmony based on I, IV, V
  • Ic–V–I cadence concluding first chorale phrase (Bars 12–13)
  • Cadences used to articulate structural divisions
  • 4–3 suspension in bass (Bar 14)
  • Fragment of cycle of fifths progression (Bars 14–15)
  • Frequent dominant and secondary seventh usage implied in bass outlining
  • Cycle of Fifths (Bar 45)
  • Perfect Cadence Intro B Minor(V-I)
  • Chromatic inflection in soprano line (Bar 64)