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)