Baroque Harmony for Piano Students

Baroque Harmony and What Piano Students Need to Know

By WKMT London | Updated June 2026

A rehearsal with a Sammartini sonata opens a window into one of the most instructive surprises in music history: that the harmonic complexity we associate with the Romantics was already fully alive in the Baroque. This article explains why baroque harmony matters for piano students — and which keyboard works to start with.

Some years ago, a rehearsal at WKMT for an upcoming classical concert introduced a Sammartini sonata from the early eighteenth century. What struck everyone in the room was the harmony: suspensions, seventh chords, ninth chords — sounds we instinctively associate with the Romantic era, present in full force nearly two centuries earlier. The Baroque was not a harmonically simple period preparing the ground for something richer. In many respects, it was the richest period of all.

These developments in music — from Sammartini to Bach — are the focus of this article, which explains why baroque harmony matters for piano students and which keyboard works every serious student needs to know.

The Baroque Harmonic Vocabulary

The Baroque period (roughly 1600–1750) established the tonal system that Western classical music still inhabits. Harmony moved from the modal ambiguity of Renaissance polyphony towards the clear major-minor tonal hierarchy that defines everything from Bach to Brahms. What is less often taught is how adventurous baroque harmony was within that framework.

The Sammartini sonata that prompted this discussion is a useful example. Giovanni Battista Sammartini (1700–1775) wrote in an idiom that bridged the late Baroque and early Classical periods. His harmony uses suspended dissonances with the same fluency that a Romantic composer uses them. The suspension (particularly the 7–6 and 4–3 types) is one of the defining fingerprints of Baroque harmonic writing.

“In the late Baroque, the sequence, the circle-of-fifths formula, seventh chords on all degrees, and the descending series of 6/3 chords are all important harmonic resources. The seventh chord on the leading note in minor keys was frequently used at climactic points before the final cadence.”

For piano students, recognising these patterns transforms the experience of practising Baroque repertoire. A 4–3 suspension in a Bach invention is not just a note to finger correctly — it is a moment of harmonic tension that tells you something about touch, weight, and timing.

The Circle of Fifths Sequence

Perhaps the most characteristic Baroque harmonic device is the circle-of-fifths descending sequence: a chain of chords each a fifth lower than the last, often with seventh chords added on each degree. This pattern drives the harmonic motor of Bach’s chorales, Handel’s keyboard suites, and much of Scarlatti’s sonata writing. Piano students who can hear and feel where a sequence is going are able to shape a phrase towards its natural harmonic destination rather than playing note by note.

Well Temperament vs Equal Temperament — What Piano Students Need to Know

One of the most instructive aspects of baroque harmony for piano students is the tuning question. Bach’s Well-Tempered Clavier is sometimes described as a celebration of equal temperament. This is a misreading. Bach used a system called well temperament, which is not the same thing.

In equal temperament (the system used by modern pianos), every semitone is exactly the same size. Every key sounds identical in character. In well temperament, the fifths are tuned with small, deliberate inequalities so that every key is playable but each key has a distinct harmonic personality. C major sounds open and stable; C sharp minor sounds tighter, more tense.

“In well temperaments, every key is usable, but the keys do not all sound the same — instead, each key has a distinct harmonic personality, with some keys a bit sunnier and smoother, and others darker and edgier.”

For piano students studying the WTC on a modern instrument: you are not hearing exactly what Bach heard. The harmonic colours that made D minor feel different from E flat major in Bach’s acoustic world are flattened in equal temperament. Understanding the original tuning context sharpens your interpretive instincts. For a detailed account of concert pitch history, see WKMT’s article on European tuning history.

Baroque Counterpoint vs Romantic Melody — A Critical Distinction

One of the most common difficulties piano students face when approaching Baroque keyboard music is the difference in texture. Romantic piano writing is fundamentally a melody-with-accompaniment idiom: there is a tune, and there is something beneath it.

Baroque keyboard writing is predominantly contrapuntal: two or more independent voices move simultaneously, each with its own rhythmic profile and melodic interest. In a Bach two-part invention, both voices are melodically significant. In a fugue, the subject passes between voices and the listener must follow it wherever it appears. This demands a different approach at the piano: practising each voice as a melody, understanding voice leading as independent musical lines rather than harmonic support.

Essential Baroque Keyboard Repertoire for Piano Students

Practical Guidance for Studying Baroque Music at the Piano

1. Analyse before you play. Identify the key, harmonic structure, where sequences occur, and where cadences fall. Baroque music is harmonically schematic — spotting the circle-of-fifths pattern before you play it means you understand where you are going.
2. Practise each voice as a melody. In contrapuntal music, every voice deserves melodic attention. Play the soprano alone; sing it. Play the alto alone. Then combine.
3. Learn ornamentation conventions. Baroque trills begin on the upper note in most contexts. Mordents, turns, and appoggiaturas have specific rhythmic realisations. Playing an ornament incorrectly is not a stylistic choice — it is a misreading.
4. Use a light, articulated touch. The harpsichord had no dynamic variation. On a modern piano, clarity of articulation and careful use of the sustain pedal (generally minimal in Bach) preserves the transparency Baroque textures require.
5. Study with score and recording simultaneously. Angela Hewitt’s Bach recordings are an excellent reference for style calibration before forming habits that are difficult to break.

Baroque Harmony and Its Connection to Later Music

One of the most instructive ways to understand baroque harmony is to trace its survival into later periods. The music teaching tradition at WKMT places strong emphasis on understanding how harmonic language evolves — and how much the Baroque provided.

The suspensions Sammartini used in the early eighteenth century reappear, intensified, in the slow movements of Beethoven’s sonatas. The circle-of-fifths sequences that drive Bach’s chorales are the same sequences that power the developmental sections of Haydn’s symphonies and Schubert’s chamber music. The 20th century did not abandon Baroque harmonic thinking — Shostakovich’s passacaglias, Prokofiev’s toccata-like keyboard writing, and Ravel’s formal symmetry all speak directly to Baroque precedents.

“Baroque harmony quite often can be more complex than the Romantic period, which quite often uses melodies with slightly more simple accompaniment. The 20th century saw a lot of experimentation — yet they still sound atmospheric, imaginative, and musical in their own way.”