J S Bach: Brandenburg Concerto No. 5 in D major, 3rd Movement

Overview

J.S. Bach composed the six Brandenburg Concertos around 1721, dedicating them to the Margrave of Brandenburg. The fifth concerto is particularly notable for elevating the harpsichord from its traditional background continuo role to a virtuoso solo instrument. The third movement, which is your set work, is a lively Gigue structured as a complex fugue. Understanding this movement requires a solid grasp of Baroque musical conventions, contrapuntal textures, and specific structural devices.

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Key Knowledge & Theory

Core Concepts

1. The Concerto GrossoThe Concerto Grosso is a quintessential Baroque form that relies on the contrast between a small group of soloists (the concertino) and a larger ensemble (the ripieno). In this concerto, the concertino consists of the flute (specifically a Baroque traverso flute), violin, and harpsichord. The ripieno is a string orchestra (violins, violas, cellos, and double bass).

2. The Basso ContinuoA continuous bass line that provides the harmonic foundation of the piece. It is typically played by a bass instrument (like the cello or double bass) and a chordal instrument (like the harpsichord), which improvises chords based on figured bass notation. In this movement, the harpsichord plays a dual role: acting as a soloist and providing the continuo.

3. The GigueA lively Baroque dance, usually in compound time. This movement is in 12/8 time (compound quadruple metre), giving it a bouncy, triplet-based feel characteristic of a jig.

4. Fugal StructureA fugue is a complex contrapuntal form where a musical theme (the subject) is introduced by one voice and then successively imitated by others.

Technical Vocabulary

Examiners expect you to use precise terminology. You must incorporate these terms into your answers:

• Polyphonic / Contrapuntal: A texture consisting of two or more independent melodic lines playing simultaneously. This is the primary texture of the fugue.
• Subject: The main theme of the fugue.
• Answer: The subject repeated in response, usually transposed to the dominant key (a fifth higher).
• Countersubject: A secondary melody played against the subject or answer.
• Episode: A section of the fugue where the subject is not heard in its entirety; used to modulate to new keys and develop material.
• Stretto: When entries of the subject overlap, building tension.
• Sequence: The immediate repetition of a melodic or harmonic pattern at a higher or lower pitch.
• Imitation: Where one musical part copies another.
• Terraced Dynamics: Sudden shifts in volume (e.g., from forte to piano) without gradual crescendos or diminuendos, created by adding or removing instruments.
• Modulation: Changing from one key to another (e.g., from D major to A major).

Practical Skills & Exam Application

Listening and Analysis

When tackling listening questions, you must link what you hear to specific musical elements (MAD T SHIRT: Melody, Articulation, Dynamics, Texture, Structure, Harmony, Instrumentation, Rhythm, Tempo).

• Instrumentation: Identify the distinct timbres. Can you hear the plucked sound of the harpsichord or the breathy tone of the wooden Baroque flute? Recognize when the full ripieno is playing versus the concertino.
• Texture: Listen for the staggered entries at the beginning of the movement. The violin enters first with the subject, followed by the flute (the answer), and then the harpsichord. This clearly demonstrates the polyphonic, fugal texture.
• Rhythm: Tap the beat. You should feel the pulse divided into threes (1-and-a 2-and-a 3-and-a 4-and-a), confirming the 12/8 compound metre and the Gigue character.

Comparative Analysis

You may be asked to compare this movement with an unfamiliar piece. When doing so, structure your response to address similarities and differences across the musical elements. For example, if comparing to a Classical concerto, you might note the difference in dynamics (terraced in Baroque vs. graduated crescendos in Classical) or instrumentation (harpsichord continuo in Baroque vs. larger woodwind section and no continuo in Classical).

Exam Component

Written Exam Knowledge

Questions on this set work will typically require you to:

1. Identify specific features from a short audio extract.
2. Describe the musical elements used in a specific section.
3. Explain how Bach creates a specific effect (e.g., how he builds tension using stretto).
4. Evaluate the piece's stylistic features in relation to the Baroque period.

Preparation Strategies

• Score Reading: Practice following the score while listening. Highlight the subject entries in different colours to visualize the fugal structure.
• Vocabulary Drills: Create flashcards for the technical vocabulary. You cannot access the highest mark bands without using terms like 'polyphonic', 'basso continuo', and 'sequence'.