Johann Sebastian Bach: the architect of counterpoint

Johann Sebastian Bach never wrote a treatise on counterpoint, yet his music is the clearest demonstration of it that exists. He spent his working life as a practical musician: organist, court composer, teacher and, for his last decades, cantor at a church in Leipzig where he was expected to supply new music for the liturgy week after week. That working life is the key to his style. Bach wrote for the forces and occasions in front of him, and in doing so he left the repertoire a body of pieces that are still studied as the standard of how independent melodic lines can move together.

Listeners often meet Bach first through a short keyboard piece and only later discover that the same contrapuntal thinking runs through concertos, church cantatas and solo works for a single instrument. This profile is a map of that territory: what counterpoint actually is, where to start, and what to listen for when the texture thickens.

What counterpoint means in practice

Counterpoint is the art of combining two or more melodic lines that are each interesting on their own and also sound right together. The difficulty is real: a line that is beautiful alone may clash with another, and a combination that sounds well may leave each individual line dull. Bach's solution was to write lines that converse, so that the ear can follow any one of them and still hear a coherent whole.

A fugue makes the idea explicit. One voice states a short subject, a second enters with the same subject while the first continues with new material, and further voices follow. Nothing is repeated mechanically: the subject may appear higher or lower, close together or far apart. The pleasure comes from recognising the returns.

A working life in four posts

Bach moved between towns and employers as a young man before settling in Leipzig. Each move brought a new job description and therefore new music: organ works where he was an organist, chamber and orchestral pieces where he served a court, and a stream of cantatas where he was responsible for a congregation's music.

The later keyboard collections are a different kind of evidence. They were assembled as teaching material, which explains their orderly arrangement by key and their difficulty in ascending order. They are almost a curriculum set to music.

Where a new listener should begin

Three short items cover three different worlds:

• A solo keyboard piece, for the sound of counterpoint with no orchestra involved.
• One movement of a concerto with a solo instrument, for the dialogue between soloist and ensemble.
• A single choral movement from a larger sacred work, for voices woven into the same texture.

Listen to each twice. The first pass is for the sound, the second for the entrances of the main idea.

What to listen for

The most useful habit is to follow one line rather than trying to hear everything. Choose the highest voice, or the lowest, and stay with it as far as you can. When you lose it, that is usually the moment another voice has taken over the melodic interest, and that handover is itself part of the design.

Dynamics in Baroque music are subtler than in later repertoire. Sudden extremes are rare; the shaping happens through texture, through how many lines are moving, and through the harmony. Do not expect the orchestral swell of the nineteenth century, and the music will sound less severe.

Common misunderstandings

Two ideas about Bach are worth correcting early. The first is that his music is mathematics first and feeling second; in fact the technical rigour exists to carry expressive weight, and the most austere passages are often the most affecting. The second is that all of his output sounds alike. The range from solo cello to massed choir is enormous.

A third point concerns attribution. A number of works once credited to Bach turned out to be by others and are catalogued accordingly. When you see a catalogue number, treat it as a filing system rather than a judgement of quality.

Bach at a glance

Where to go next

Once one piece has become familiar, take a second from a different area and notice what stays the same. The manner is recognisable across the whole output: a steady pulse, lines that matter individually, and a harmony that supports without drawing attention to itself. That consistency is why Bach remains the composer other composers study.