A motif is musical DNA. Often just 2–4 notes, yet a well-crafted motif can become the seed of an entire work.
The most famous motif in music history is the “da-da-da-daaa” of Beethoven's Fifth Symphony (“fate knocking at the door,” as legend has it). The entire first movement is built on those four notes. Wagner developed the system of leitmotifs — motifs tied to characters, feelings, and objects. In film music, John Williams perfected this approach: the themes of Luke Skywalker, Darth Vader, and Harry Potter all grow from short, memorable motifs.
A motif is the smallest meaningful unit of music, usually containing at least one accent. Motifs combine into phrases, phrases into themes. A composer develops a motif through sequence (repetition at another pitch), inversion, and rhythmic change, so that a whole large-scale form grows from a tiny seed. The ability to hear one short motif at the root of an entire work is a mark of attentive, “structural” listening.
