Texture and structure: monophonic, homophonic, polyphonic and heterophonic textures, layering and number of parts, and structural forms including binary, ternary, rondo, sonata, theme and variations, verse-chorus and through-composed.

What this dot point is asking

Texture and structure are core elements of the Component 1 appraising toolkit. AQA wants you to identify the texture of an extract (how the parts combine) and its structure (how the music is organised over time), using precise terms for both when analysing extracts in Section A and when constructing the Section B essay.

Describing texture

It helps to picture each texture. Monophony is a single melodic line with no harmony, whether played by one instrument or by many in unison or octaves, as in plainchant or an unaccompanied folk song. Homophony, the most common Classical texture, has one clear melody supported by chords; a special case is homorhythmic or chordal texture (such as a hymn) where all the parts move in the same rhythm. Polyphony, also called counterpoint, weaves two or more independent melodic lines of roughly equal importance, the texture of a fugue or a Baroque trio sonata. A useful sub-type is melody and accompaniment, where the accompaniment is broken up, for example by an Alberti bass that spreads a chord into a flowing pattern. Heterophony, common in folk and world traditions, has performers playing simultaneous decorated variants of the same tune. Always add the detail: the number of parts, the layering (melody, bass, inner parts) and whether the texture thins or thickens, because these descriptors carry marks beyond the single label.

Structural forms

Each form has tell-tale signs. Binary form (AB) has two sections, the first usually moving to the dominant and the second returning to the tonic, both often repeated. Ternary form (ABA) states an idea, contrasts it, then returns to the opening, the contrast usually in a related key. Rondo (ABACA or similar) keeps returning to a refrain (A) between contrasting episodes. Theme and variations presents a theme then transforms it repeatedly through changes of rhythm, harmony, texture or mode. Sonata form, the most important Classical structure, has an exposition (a first subject in the tonic, a transition, and a second subject in a contrasting key, usually the dominant or relative major), a development (the material fragmented, sequenced and moved through keys), and a recapitulation (both subjects returning, now both in the tonic). A ground bass repeats a bass line under changing upper parts (as in a Baroque passacaglia). In pop, verse-chorus (often with intro, pre-chorus, bridge and outro) dominates. Through-composed music has continuous new material with no repeated sections, common in song settings that follow a changing text.

How texture and structure interact

Composers routinely pair textural change with structural change, which is why hearing one helps you identify the other. A fugue builds polyphonic density as voices enter, articulating its structure through entries of the subject. A Classical movement may thin to a delicate solo texture for a second subject, then return to a fuller tutti at the recapitulation. In pop, a verse is often a sparser texture than the fuller, hook-bearing chorus. Identifying both texture and structure together, and showing how they reinforce each other, is what lifts an analysis from labelling to genuine explanation.