A song is a block of time broken into smaller sections, and arranging is assembling those sections

Song structure treats a whole song as a block of time that can be subdivided into smaller blocks — sections. Each section is itself a combination of the patterns (beats, basslines, chords, melodies) that are playing during that stretch. Composing at this scale — deciding the order, length and content of sections — is called arranging: it is how you get from small repeating patterns up to a complete song. The key move is that sections differ from one another (in which elements play, and their energy), and the sequence of sections shapes the listener’s journey through the track. This is the level above loop-toggling: instead of on/off moment-to-moment, you plan spans of time.

Examples

Lay out a song as blocks on a timeline: an 8-bar intro (drums only), a 16-bar main section (all elements), an 8-bar breakdown (chords + melody, no drums), then the main section again. Arranging = choosing and ordering these blocks.

Assessment

Take a set of loops and arrange them into at least four contiguous sections on a timeline, each section a distinct combination. State how each section differs from its neighbour and why the ordering builds and releases energy.