Concerto Detective Work: Identifying Period and Style in an Unfamiliar Extract

Cracking an Unfamiliar Concerto Extract

In your listening exam you may be played a short concerto extract you have never heard before and asked to identify its period, or to explain how the composer has used musical elements. This sounds daunting, but it is entirely doable if you work through the same checklist every time. This lesson gives you that checklist — forces, continuo, dynamics, harmony and soloist writing — and then shows you how to turn each observation into an exam-worthy sentence with evidence.

Step 1: Count the Forces — Orchestra Size and Make-Up

The very first thing to listen for is how big and how varied the ensemble sounds. A Baroque concerto typically uses a small string orchestra of perhaps a dozen players, often with a harpsichord holding the continuo part together. Vivaldi’s The Four Seasons and Bach’s Brandenburg Concerto No 4 both use modest forces like this, with the solo violin or recorders emerging from a texture of first and second violins, violas, cellos and continuo. By the Classical period the orchestra has grown to include pairs of woodwind (flutes, oboes, bassoons), horns and sometimes trumpets and timpani, alongside a fuller string section. Mozart’s Flute Concerto in D major and Haydn’s Trumpet Concerto in Eb major both use this expanded Classical orchestra. By the Romantic era, composers such as Brahms and Rachmaninov write for a full symphony orchestra with a much wider range of woodwind, brass, sometimes harp, and a far bigger string section, capable of enormous volume and colour.

So your first exam sentence should always place the extract on this scale: is the accompanying group small and string-dominated (Baroque), moderately sized with paired woodwind and horns (Classical), or large, colourful and full-orchestra (Romantic)? Listen especially for the presence or absence of clarinets (not used before the Classical period), and for a big, lush string sound with divided parts, which points strongly towards the Romantic era.

Step 2: Continuo and Dynamics — Terraced or Graded?

Once you have judged the size of the ensemble, listen specifically for continuo and for the way dynamics change. In the Baroque solo concerto and the concerto grosso, a continuo part (usually harpsichord and cello, sometimes with an organ) fills in the harmony almost constantly beneath the strings. Dynamics in Baroque music are typically terraced: they shift suddenly from loud to soft as the texture switches between the full orchestra, or tutti, and the soloist, or solo group, rather than growing gradually. There is rarely a written crescendo or diminuendo — the terracing itself creates the contrast.

Listen to the opening ritornello of a Vivaldi concerto movement and you will hear this terracing clearly: the full string tutti announces a bold theme, then suddenly drops back for the soloist’s more decorated version of similar material, before the tutti returns just as abruptly. This alternation between tutti and solo, built around a returning ritornello theme, is one of the clearest fingerprints of Baroque concerto form.

As you listen to that recording, track the terraced dynamics precisely: note every point where the full ensemble drops away to leave the solo violin exposed, and every point where the ritornello theme returns in the tutti. By contrast, Classical and especially Romantic composers use graded dynamics — long, carefully written crescendos and diminuendos that swell and fade smoothly, often stretching across many bars, sometimes reinforced by dynamic markings as detailed as pianissimo through to fortissimo. If you hear a slow, continuous build in volume rather than a sudden jump, you are almost certainly listening to Classical or Romantic music, not Baroque.

Step 3: Harmony and Soloist Writing — Plain or Virtuosic?

Next, listen to the harmony and how demanding the solo part sounds. Baroque and Classical concertos are built mostly on diatonic harmony — chords drawn from the notes of the home key, with fairly predictable progressions and clear perfect and imperfect cadences marking off phrases. Romantic concertos push much further into chromatic harmony, using notes outside the home key, unexpected modulations to distant keys, and richer, denser chords that can make the tonality feel unstable or emotionally charged. Rachmaninov’s Piano Concerto No 2 in C minor is a strong example of this lush, chromatic Romantic harmonic language, full of sweeping melodic lines supported by thick, shifting chords.

The way the soloist is written for also changes dramatically across the periods. In the Baroque era the soloist’s part, while decorated with ornamentation such as trills and turns, generally stays within a similar range and technical demand to the orchestral parts. By the Classical period, composers begin writing more clearly virtuosic passages designed to display the performer’s skill — fast scalic and arpeggio-based runs, wide leaps, and a dedicated unaccompanied cadenza near the end of the movement where the soloist improvises or plays a written-out display passage alone.

Notice in that recording how Mozart writes idiomatically for the flute, with rapid scale passages, arpeggios and ornamented turns that clearly show off the soloist’s agility, while the orchestral accompaniment remains lighter in texture beneath, often reduced to simple chordal support so the flute’s melody projects clearly. This soloist-versus-accompaniment relationship, with the orchestra stepping back to let virtuosic solo writing shine, becomes even more extreme in the Romantic period, where soloists face enormous technical and expressive demands across huge dynamic and pitch ranges.

Naming Elements with Evidence: A Worked Walkthrough

Once you have made your period judgement, the exam question will usually ask you to describe specific musical elements with evidence, not just state a period. Build your answer element by element. For instruments and timbre, name the solo instrument and describe the orchestral colour (for example, ‘solo trumpet answered by strings and continuo harpsichord’). For pitch and melody, comment on range, shape and whether it is scalic, arpeggio-based, or built from short repeated motifs. For rhythm and metre, note the time signature feel, whether rhythms are simple and driving (common in Baroque) or more varied and rubato-like (more common in Romantic solo writing).

For texture, always state clearly whether you are hearing melody-dominated homophony, a contrapuntal interweaving of parts, or the alternating tutti-and-solo texture typical of the concerto itself. For structure, phrasing and cadences, identify whether the movement uses ritornello form (Baroque), sonata form with an exposition, development and recapitulation (Classical and Romantic), and listen for perfect cadences closing phrases confidently or imperfect cadences leaving the music sounding unfinished. For harmony and tonality, state whether the passage feels diatonic and stable or chromatic and shifting. Finally, comment on repetition, sequence and imitation — sequences (a short pattern repeated at a different pitch) are extremely common across all three periods and are always worth pointing out with the bar or timing where you hear them.

Do not forget ornamentation: trills, turns, mordents and appoggiaturas decorate melodic lines in all periods but are handled differently — more formulaic in the Baroque, more expressive and personal by the Romantic era, where composers like Rachmaninov write sweeping rubato-style decoration directly into the melodic line rather than relying on separate ornament symbols.

A/B Listening Comparison: Baroque vs Romantic

The fastest way to sharpen your ear is to compare two extracts back to back, one from each end of the timeline, and note every contrast using the checklist above. Listen again to the Vivaldi extract above, then immediately listen to the Rachmaninov recording below, pausing to jot down at least one difference for each element: forces, continuo, dynamics, harmony, and soloist virtuosity.

In the Rachmaninov, listen for the enormous orchestral forces (full strings, brass and woodwind), the complete absence of any harpsichord continuo, long graded crescendos building to powerful climaxes, richly chromatic harmony full of unexpected chord colours, and a piano part demanding extreme virtuosity across the whole range of the keyboard. Every one of these features stands in direct contrast to the terraced dynamics, continuo, diatonic harmony and smaller forces you heard in the Vivaldi.

Practise this A/B comparison technique regularly with different pairs of recordings from the suggested repertoire — Corelli against Brahms, or Haydn against Rachmaninov — until spotting these contrasts becomes automatic rather than effortful.